Main Stick is changed to Control Stick and C-Stick is changed to C Stick.
A new ui_name variable is added to ControlGroup so that the UI strings
in DolphinWX can be updated without breaking backwards compatibility
with config INIs and other things that use names as IDs.
Having settings for each game in more than one file is redundant.
Now, region-free INIs are now only for settings, and region-specific
INIs are only for AR codes and patches. Exceptions are made for
titles that share the first three characters of their IDs with
unrelated titles (mostly unlicensed titles and Triforce titles).
