Main window auto-size fixes

[kalimag]

• Ensure that the top left corner of the window remains on screen if the entire window cannot fit at 1x scale
  • Fix title bar/menu moving off-screen with unusually large framebuffer sizes
  • The bottom/right edge may move off-screen instead, but that seems like the lesser evil
• When MainWindow.FrameBufferResized is called while the window is minimized or maximized, defer the resize until the window is restored to normal again
  • Fix window being disproportioned or moving erratically because the resize logic was working off of the minimized/maximized window sizes
• Remember window maximized state after restart
  • This was intended to be part of Add option to disable automatic resize of main window #4011, but it depends on the previous fix to work properly

Resolves #2850

Check if completed:

• I have run any relevant test suites
• I, the committer, have read the licensing terms for contributors (last updated 2024-06-22) and am compliant

[YoshiRulz]

LGTM. Just to clarify, does this fix the linked issue for fullscreen or just maximised? Our fullscreen isn't real fullscreen anyway so I expect it's both.

[kalimag]

Yeah it works for "fullscreen" as well.