Event System: click/click-drag support for NDOF buttons

Support this for completeness, as it's simpler to support click-drag
for all events types that support press/release instead of having to
document which kinds buttons support click-drag.

source/blender/windowmanager/intern/wm_event_system.c

@@ -5142,11 +5142,15 @@ void wm_event_add_ghostevent(wmWindowManager *wm, wmWindow *win, int type, void
         case GHOST_kRelease:
           event.val = KM_RELEASE;
           break;
+        default:
+          BLI_assert_unreachable();
       }
 
       event.custom = 0;
       event.customdata = NULL;
 
+      wm_event_state_update_and_click_set(&event, event_state);
+
       wm_event_add(win, &event);
 
       break;

source/blender/windowmanager/wm_event_types.h

@@ -371,7 +371,8 @@ enum {
  * \note Mouse wheel events are excluded from this macro, while they do generate press events it
  * doesn't make sense to have click & click-drag events for a mouse-wheel as it can't be held down.
  */
-#define ISKEYBOARD_OR_BUTTON(event_type) (ISMOUSE_BUTTON(event_type) || ISKEYBOARD(event_type))
+#define ISKEYBOARD_OR_BUTTON(event_type) \
+  (ISMOUSE_BUTTON(event_type) || ISKEYBOARD(event_type) || ISNDOF_BUTTON(event_type))
 
 /** Test whether the event is a modifier key. */
 #define ISKEYMODIFIER(event_type) \