Not working on flatpaks when Extension installed via AUR

[Vishwamz]

Describe the bug
Is not working on flatpaks with Extension installed via AUR

To Reproduce
Steps to reproduce the behavior:

1. Installed extension using ' yay -S gnome-shell-extension-unite '
2. logged out logged in
3. Done changes required to hide Title bars (work on system apps)
4. Done both flatpak --override and forcing files using flatseal. Used /usr/share/gnome-shell/extensions/unite@hardpixel.eu as path for my extensions files as extension is install in system.
5. Can still see the Title bar (not hidden)

Expected behavior
Hidden Title bar in flatpak apps

Screenshots

Environment (please complete the following information):

• OS: [e.g. EndeavourOS ]
• GNOME Shell version [e.g. 48]
• Unite version [e.g. 82]

Logs
Provide system logs related to unite extension using journalctl -g unite.

Apr 18 08:52:44 EndeavourOS sudo[8765]: vishwam : TTY=pts/0 ; PWD=/home/vishwam ; USER=root ; COMMAND=/usr/bin/pacman -U --config /etc/pac>
Apr 18 08:52:45 EndeavourOS sudo[8776]: vishwam : TTY=pts/0 ; PWD=/home/vishwam ; USER=root ; COMMAND=/usr/bin/pacman -D --asexplicit -q ->
Apr 18 08:59:44 EndeavourOS gnome-shell[10121]: Extension unite@hardpixel.eu already installed in /usr/share/gnome-shell/extensions/unite@h>
Apr 18 09:02:13 EndeavourOS ulauncher.desktop[12243]: F: Not sharing "/usr/share/gnome-shell/extensions/unite@hardpixel.eu/styles" with san>
Apr 18 09:02:13 EndeavourOS extension-manag[12255]: Theme parser error: gtk.css:2:1-106: Failed to import: Error opening file /usr/share/gn>
Apr 18 09:02:38 EndeavourOS ulauncher.desktop[12303]: F: Not sharing "/usr/share/gnome-shell/extensions/unite@hardpixel.eu/styles" with san>
Apr 18 09:02:38 EndeavourOS ulauncher.desktop[12314]: [2, Main Thread] WARNING: Theme parsing error: gtk.css:2:105: Failed to import: Error>
Apr 18 09:02:38 EndeavourOS zen[12314]: Theme parsing error: gtk.css:2:105: Failed to import: Error opening file /usr/share/gnome-shell/ext>
Apr 18 09:04:03 EndeavourOS gnome-shell[12936]: Extension unite@hardpixel.eu already installed in /usr/share/gnome-shell/extensions/unite@h>
Apr 18 09:04:14 EndeavourOS ulauncher.desktop[14263]: F: Not sharing "/usr/share/gnome-shell/extensions/unite@hardpixel.eu/styles" with san>
Apr 18 09:04:15 EndeavourOS extension-manag[14291]: Theme parser error: gtk.css:2:1-106: Failed to import: Error opening file /usr/share/gn>
Apr 18 09:04:25 EndeavourOS ulauncher.desktop[14395]: F: Not sharing "/usr/share/gnome-shell/extensions/unite@hardpixel.eu/styles" with san>
Apr 18 09:04:25 EndeavourOS extension-manag[14407]: Theme parser error: gtk.css:2:1-106: Failed to import: Error opening file /usr/share/gn>
Apr 18 09:04:44 EndeavourOS ulauncher.desktop[14463]: F: Not sharing "/usr/share/gnome-shell/extensions/unite@hardpixel.eu/styles" with san>
Apr 18 09:04:44 EndeavourOS com.github.tchx[14474]: Theme parser error: gtk.css:2:1-106: Failed to import: Error opening file /usr/share/gn>
-- Boot 07e429a2280d4d489babc1609ac5b08e --
Apr 18 09:05:25 EndeavourOS gnome-shell[838]: Extension unite@hardpixel.eu already installed in /usr/share/gnome-shell/extensions/unite@har>
Apr 18 09:05:36 EndeavourOS ulauncher.desktop[2111]: F: Not sharing "/usr/share/gnome-shell/extensions/unite@hardpixel.eu/styles" with sand>
Apr 18 09:05:36 EndeavourOS extension-manag[2283]: Theme parser error: gtk.css:2:1-106: Failed to import: Error opening file /usr/share/gno>
Apr 18 09:09:12 EndeavourOS ulauncher.desktop[3251]: F: Not sharing "/usr/share/gnome-shell/extensions/unite@hardpixel.eu/styles" with sand>
Apr 18 09:09:13 EndeavourOS com.github.tchx[3262]: Theme parser error: gtk.css:2:1-106: Failed to import: Error opening file /usr/share/gno>
Apr 18 09:23:22 EndeavourOS ulauncher.desktop[4116]: F: Not sharing "/usr/share/gnome-shell/extensions/unite@hardpixel.eu/styles" with sand>
Apr 18 09:23:22 EndeavourOS extension-manag[4128]: Theme parser error: gtk.css:2:1-106: Failed to import: Error opening file /usr/share/gno>
Apr 18 09:28:04 EndeavourOS ulauncher.desktop[4900]: F: Not sharing "/usr/share/gnome-shell/extensions/unite@hardpixel.eu/styles" with sand>
Apr 18 09:28:05 EndeavourOS com.github.tchx[4911]: Theme parser error: gtk.css:2:1-106: Failed to import: Error opening file /usr/share/gno>
Apr 18 09:31:09 EndeavourOS ulauncher.desktop[5083]: F: Not sharing "/usr/share/gnome-shell/extensions/unite@hardpixel.eu" with sandbox: Pa>
Apr 18 09:31:09 EndeavourOS extension-manag[5095]: Theme parser error: gtk.css:2:1-106: Failed to import: Error opening file /usr/share/gno>
Apr 18 09:32:57 EndeavourOS sudo[5265]: vishwam : TTY=pts/0 ; PWD=/home/vishwam ; USER=root ; COMMAND=/usr/bin/flatpak override --filesyst>
Apr 18 09:32:57 EndeavourOS polkitd[655]: Registered Authentication Agent for unix-process:5270:166343 (system bus name :1.156 [flatpak ove>
Apr 18 09:33:15 EndeavourOS ulauncher.desktop[5318]: F: Not sharing "/usr/share/gnome-shell/extensions/unite@hardpixel.eu" with sandbox: Pa>
Apr 18 09:33:16 EndeavourOS extension-manag[5330]: Theme parser error: gtk.css:2:1-106: Failed to import: Error opening file /usr/share/gno>
-- Boot 51a5a537abb945e79327b70c5483782e --
Apr 18 09:34:40 EndeavourOS gnome-shell[820]: Extension unite@hardpixel.eu already installed in /usr/share/gnome-shell/extensions/unite@har>
Apr 18 09:34:48 EndeavourOS ulauncher.desktop[2081]: F: Not sharing "/usr/share/gnome-shell/extensions/unite@hardpixel.eu" with sandbox: Pa>
Apr 18 09:34:49 EndeavourOS extension-manag[2100]: Theme parser error: gtk.css:2:1-106: Failed to import: Error opening file /usr/share/gno>
Apr 18 09:34:56 EndeavourOS ulauncher.desktop[2373]: F: Not sharing "/usr/share/gnome-shell/extensions/unite@hardpixel.eu" with sandbox: Pa>
Apr 18 09:34:56 EndeavourOS extension-manag[2385]: Theme parser error: gtk.css:2:1-106: Failed to import: Error opening file /usr/share/gno>
Apr 18 09:36:54 EndeavourOS sudo[3168]: vishwam : TTY=pts/1 ; PWD=/home/vishwam ; USER=root ; COMMAND=/usr/bin/pacman -R -s --config /etc/>
Apr 18 09:37:14 EndeavourOS gsd-color[3982]: Theme parsing error: gtk.css:2:105: Failed to import: Error opening file /usr/share/gnome-shel>
Apr 18 09:37:14 EndeavourOS gsd-power[3998]: Theme parsing error: gtk.css:2:105: Failed to import: Error opening file /usr/share/gnome-shel>
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Additional context
Works completely fine when Installed extension using wget and giving path as xdg-data