Cleaning up xdbf stuff.

- moving next to xex utils
- fixing error cases around icon setting (and allowing reset)
- making C++11
- abstracting a bit so future additions will be easier
- fixing non-xex uses

premake5.lua

@@ -190,7 +190,6 @@ solution("xenia")
   include("src/xenia/ui/gl")
   include("src/xenia/ui/spirv")
   include("src/xenia/vfs")
-  include("src/xenia/xdbf")
 
   if os.is("windows") then
     include("src/xenia/apu/xaudio2")