Corrected typos and missing translations.
Visual feedback when editDisplayName fails and altered the list of accepted chars for Files and Contents
Corrected typos
UploadFile and editDisplayName both display messages from ApplicationResources instead of SiteResources
Minor cleanup
Unified some invalid name messages and changed the text to receive allowed characters. Corrected typos.
List of valid characters only in File and Content and passed to the error message
Added space and characters with diacritics (latin) to the accepted list of characters