GetName() creates a new evdev device which calls tons of ioctls. But the
main culprit is close() which for input devices appears to be a slow
path in the kernel.
This commit reduces PopulateDevices() by 50% on my laptop, but ~730 ms
is still ridiculously slow for something that isn't needed right away.
The SDL backend crashes when you close a joystick after SDL_Quit has
been called. Some backends don't need to be shutdown and
re-initialized everytime, we can just ask to enumerate devices again.
Removed the unecessary forced tabbed layout, removed the layout part of the constructor and remade some method in preparation for tabbed styled input dialog such as the new hotkey configuration one. It breaks every inputconfigDialog, but this will get fixed in the next commits.
Also moved to a folder since there will be many more files created in the next commits so it gives better separation.
For hotkeys, changed HotkeyManager to allow to get and make partial groups of hotkeys.
Also preserved the old configuration naming scheme for the ini, this is done to preserve compatibility with the older groups structure.
Add the ability to get GCPad control groups
Used like the HotkeyManager methods, this is used for the new GCPad configuration dialog.
Add the ability to get groups of Keyboard input
Same reasons as the previous ones.
Add ability to get groups of Wiimote input
Add the ability to get extensions group
This needed to pass to 3 classes. Will be used for their respective dialogs.