This shouldn't normally happen as conforming drivers are required to
support that texture format, but the software driver that we
accidentally choose on Poco C40 (see issue #16391) doesn't.
That we choose that driver will be fixed separately. This fix on its own
at least lets the user comfortably navigate to settings and switch to
OpenGL.
* Wrap the display globals in a struct
Makes it easier to search/replace these, for future refactorings.
* Some renaming
* Qt buildfix, also fix the Qt build on Mac (got broken with battery changes)
* Attempt at buildfixing ios
* UWP buildfix
* Remove unmotivated check preventing texture ini creation on mobile.
Fixes#15644
* Show a "toast" message on platforms that don't support opening a text editor, when you try to create/open a texture ini file.
* Avoid the need to ifdef around calls to SystemToast
* UWP buildfix (and some warning fixes).
And possibly libretro fix
* Rename for a bit more consistency
