allow localization for "Copy to clipboard" string

src/keepass2android/EntryActivityClasses/CopyToClipboardPopupMenuIcon.cs

@@ -27,8 +27,7 @@ namespace keepass2android
 		}
 		public string Text
 		{
-			//TODO localize
-			get { return "Copy to clipboard"; }
+			get { return _context.Resources.GetString(Resource.String.copy_to_clipboard); }
 		}
 
 		

src/keepass2android/Resources/values/strings.xml

@@ -68,6 +68,7 @@
   <string name="digits">Digits</string>
   <string name="disclaimer_formal">Keepass2Android comes with ABSOLUTELY NO WARRANTY; This is free software, and you are welcome to redistribute it under the conditions of the GPL version 2 or later.</string>
   <string name="ellipsis">\u2026</string>
+	<string name="copy_to_clipboard">Copy to clipboard</string>
 
   <string name="enter_filename">Enter database filename</string>
   <string name="entry_accessed">Accessed</string>