Altered a few of the input images to improve readability of some of the text
Standardizes the menuInputButton set usage to just use the raw action names rather than a middleman naming scheme for simplicity and standardization
Added comments to menuInputButtons.cs
Split out the menuInputButton containers to simplify and stabilize the code on the messageBox dialog
Removed old reference to script/gui files not there anymore
Simplified the input state check in guiGameListMenuCtrl.cpp
Added a check so we don't try exec'ing the selected list item in guiGameListMenuCtrl.cpp if nothing has actually be selected
Many instances of a function or expression being used repeatedly, which can lower performance.
Fixed it in these cases by creating on local var, reference or pointer that's used instead.
