Borderless ALSO in windowed mode (on partial screen).

[studiojurdan]

Requirements

• This issue doesn't already exist
• This is only a single feature request (Otherwise create a separate issue)

Is this proposal related to a problem?

"My" problem is that i use a ultra wide screen (21/9) and need to use a 16/9 windows game in, it.
But the title bar is realy a bad thinks.
I can see when i move the windows in you program, somtiime the title bar goes OFF
So i just want to this momental purpose can become REAL and fuctional too?
This will save my life lol

Describe the solution you'd like

Just add a buton in midle colon to remove the title bar on a windows in the right panel of the program ;-)

Additional context

No response