Fix missing genericeditor message Messages

https://github.com/eclipse-platform/eclipse.platform/issues/857

Author: merks

bundles/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/messages.properties

@@ -15,3 +15,6 @@ DefaultWordHighlightStrategy_OccurrencesOf=Occurrence of ''{0}''
 
 TextViewer_open_hyperlink_error_title=Open Hyperlink
 TextViewer_open_hyperlink_error_message=The operation is not applicable to the current selection. Select a hyperlink target.
+
+GotoMatchingBracket_error_noMatchingBracket=No matching bracket found
+GotoMatchingBracket_error_bracketOutsideSelectedElement=Matching bracket is outside the selected element