Updated parsing for dictionary filenames (to appear in the list for user...

Updated parsing for dictionary filenames (to appear in the list for user preferences): Dictionary filenames can now include "-supplimental" after the localization (such as dictionary_en-US-supplimental.txt" if it's a smaller dictionary only with localized spellings of words.  Those dictionaries will include "(Supplimental)" at the end of their name in the user preferences.  Dictionary filenames without a localization after the language (such as dictionary_en.txt) will include "(General)" at the end of their name in the user preferences.  Dictionaries with just the localization without "-supplimental" will just have the language name and localization as the language name in the user preferences (i.e., dictionary_en-US.txt will be "English (US)".