Add localization keys:
 - ASCompletion.Label.GenerateProtectedFieldFromParameter
 - ASCompletion.Label.GenerateProtectedFunction
 - ASCompletion.Label.GenerateProtectedVar
Implement localization keys:
- ASCompletion.Label.GenerateProtectedFieldFromParameter
- ASCompletion.Label.GenerateProtectedFunction
- ASCompletion.Label.GenerateProtectedVar
Fix comments of localization keys
Merge pull request #323 from SlavaRa/gen-protected-decl

Update contextual generator menu for "Generate Protected Declarations" settings