* Added HiddenFileTypes to config state, and check to file enumeration
* Added hiddenfiletypes checkboxes to the UI
* Added Ava version of HiddenFileTypes
* Inverted Hide to Show with file types, minor formatting
* all variables with a reference to 'hidden' is now 'shown'
* one more variable name changed
* review feedback
* added FileTypes extension methof to get the correlating config value
* moved extension method to new folder and file in Ryujinx.Ui.Common
* added default case for ToggleFileType
* changed exception type to OutOfRangeException
