The core InputCommon Hotkeys interface does all of this for us.

- FileSearch is now just one function, and it converts the original glob
  into a regex on all platforms rather than relying on native Windows
  pattern matching on there and a complete hack elsewhere.  It now
  supports recursion out of the box rather than manually expanding
  into a full list of directories in multiple call sites.

  - This adds a GCC >= 4.9 dependency due to older versions having
  outright broken <regex>.  MSVC is fine with it.

- ScanDirectoryTree returns the parent entry rather than filling parts
  of it in via reference.  The count is now stored in the entry like it
  was for subdirectories.

- .glsl file search is now done with DoFileSearch.

- IOCTLV_READ_DIR now uses ScanDirectoryTree directly and sorts the
  results after replacements for better determinism.

Show the cursor in os x fullscreen by default. Fixes issue 8376.

Read opening.bnr to get names from Wii discs

I'm not sure if Maker is the best name (Developer? Publisher?
Company? Copyright?) but I went with it because it's
what the game properties window uses. For the sake of
backwards compatibility, the INI option wasn't renamed.