macosx: when resetting VLC's config in the prefs panels, also reset the OS X specific NSDefaults

(cherry picked from commit 85a9ef4fcb2019f29504900fdb104a60ec995f65)

modules/gui/macosx/prefs.m

@@ -238,8 +238,14 @@ static VLCPrefs *_o_sharedMainInstance = nil;
 {
     if( i_return == NSAlertAlternateReturn )
     {
+        /* reset VLC's config */
         config_ResetAll( p_intf );
         [_rootTreeItem resetView];
+        config_SaveConfigFile( p_intf );
+
+        /* reset OS X defaults */
+        [NSUserDefaults resetStandardUserDefaults];
+        [[NSUserDefaults standardUserDefaults] synchronize];
     }
 }
 

modules/gui/macosx/simple_prefs.m

@@ -774,9 +774,14 @@ static inline char * __config_GetLabel( vlc_object_t *p_this, const char *psz_na
 {
     if( i_return == NSAlertAlternateReturn )
     {
+        /* reset VLC's config */
         config_ResetAll( p_intf );
         [self resetControls];
         config_SaveConfigFile( p_intf );
+
+        /* reset OS X defaults */
+        [NSUserDefaults resetStandardUserDefaults];
+        [[NSUserDefaults standardUserDefaults] synchronize];
     }
 }