Support monitoring only some events in wxGTK wxFileSystemWatcher.

Call inotify() with the appropriate flags instead of always using IN_ALL_EVENTS.

Closes #14832.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72961 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/fswatcher.h

@@ -68,6 +68,7 @@ public:
             The name of the path to watch.
         @param events
             An optional filter to receive only events of particular types.
+            This is currently implemented only for GTK.
      */
     virtual bool Add(const wxFileName& path, int events = wxFSW_EVENT_ALL);