Made Stick and IR Widgets bigger
Improved Stick and IR layouts to better utilize space
Made Stick and IR Widgets Scale at a fixed ratio when window is resized
Added Scrollbars to Stick and IR Widgets
Reduced Spinbox padding in dark style

Yellow squiggly lines begone!
Done automatically on .cpp files through `run-clang-tidy`, with manual corrections to the mistakes.
If an import is directly used, but is technically unnecessary since it's recursively imported by something else, it is *not* removed.
The tool doesn't touch .h files, so I did some of them by hand while fixing errors due to old recursive imports.
Not everything is removed, but the cleanup should be substantial enough.
Because this done on Linux, code that isn't used on it is mostly untouched.
(Hopefully no open PR is depending on these imports...)

This generated a warning on GCC about the operation being potentially undefined (-Wsequence-point). I'm not sure if that was actually the case, but either way it is a mistake.

We should expose Enable Controller Input and the turbo settings for
GBA just like we do for GameCube controllers and Wii Remotes.
I just forgot about it when implementing the GBA TAS input window.

When emulated GBAs were added to Dolphin, it was possible to control them
using the GC TAS input window. (Z was mapped to Select.) Unaware of this,
I broke the functionality in b296248.

To make it possible to control emulated GBAs using TAS input again,
I'm adding a proper TAS input window for GBAs, with a real Select button
and no analog controls.