[Toolbox] TB config isn't loaded if SubredditView is launched directly

[timawesomeness]

Originally reported at https://discord.com/channels/407573578985242635/407573579543347202/939125098647015474:

On my android 12 (OneUI 4) phone, I just tried opening the widged that immediately brings me to the r/CrappyDesign subreddit sorted by new by default and waiting 4 minutes, refreshing the subreddit and checking if the removal reasons appear, with no result.

Then, i closed the app and reopened it from the normal icon (not a widget), went to r/CrappyDesign from the list of subreddit in the burger menu (without opening the settings), and they worked!

Investigation: Toolbox configs are only automatically loaded from net/cache if UserSubscriptions.doOnlineSyncing() is run, which only happens if MainActivity is launched, which doesn't happen if something (e.g. a widget) opens a subreddit directly. I totally overlooked that app launch method when implementing TB. Likely also applies to links that directly open a CommentsScreen activity. Simple fix will be to load config before/in evaluating ToolboxUI.canShowRemoval() if it isn't already loaded.