the mediaSwitches UI is sorted alphabetically while the switches data strucutre is not
the previous implementation of the delete function was just using the index of the currently selected row to delete this index of the switches data structure
the new implementation will try to find the correct entry and delete it
Reverts part of commit e61905d02f
Fallback to WM_NAME if _NET_WM_NAME does not exist
Also fixes some BadWindow errors that were due to some apps like Steam only populating WM_NAME, and only for certain windows (tooltips count as windows due to the odd way the GUI works on Linux, so they don't have either property)
Freedesktop recommends using _NET_WM_NAME instead of WM_NAME, and on KDE, for example, the difference between them is including the application name for some windows (e.g. "freedesktop - Google Search - Vivaldi" compared to "freedesktop - Google Search")
isInFocus() can utilize the platform-dependent GetCurrentWindowTitle() instead of re-implementing the same functionality.
Tested on Linux and macOS without issues
Direct matching before regex has the potential to interfere with some usecases. For example, if a user wants to enter regex syntax such as `shell[1]`, a direct match would return a window matching `shell[1]` exactly instead of `shell1`. Granted, the odds of the two conflicting each other are slim, but the core logic shouldn't prevent a user from utilizing regex to its full potential. One can always escape reserved characters if they want to match it directly. I have also added a warning and link to https://regexr.com in the UI should this be accepted.
The rest of what has changed is simply to align with the executable switcher's matching, namely the use of `QRegularExpression` to drop the need for a try/catch block and moving the check for fullscreen to the if statement in order to remove the possibility of a race condition.
