cleanup extended debug console

[commy2]

When merged this pull request will:

• fixed PREV / NEXT function not being case sensitive (annoying/confusing when debugging case sensitive code)
• fixed using debug console for the first time would enable PREV button (very minor bug)
• fixed position in previous statements after closing and reopening the game (uiNamespace var had to be profileNamespace var)
• fixed pressing shift + enter (newline) would save expression as if enter was pressed
• cache function in ui namespace so pause menu opens slightly faster
• added some GVAR for global variables
• added missing private
• removed disableSerialization (not needed in unscheduled function)
• macros for UI grids
• macros for IDC's
• some simplifications, less global vars, descriptive variable names, removed unused code

[commy2]

• added translations for the buttons and changed title to "Extended Debug Console"
• also record expression when code performance button is used

[commy2]

• moves debug console down one grid, so it doesn't kiss the top edge of the screen, but uses free space at the bottom instead