Fix T67062: Movie Clip Editor does not update Editor Type when changing Editing Context

Previously when switching modes, the code didn't check if we were in the
correct view for the masking mode.

Reviewed By: Sergey

Differential Revision: http://developer.blender.org/D5288

source/blender/editors/space_clip/clip_ops.c

@@ -1515,6 +1515,11 @@ static int mode_set_exec(bContext *C, wmOperator *op)
 
   sc->mode = mode;
 
+  if (sc->mode == SC_MODE_MASKEDIT && sc->view != SC_VIEW_CLIP) {
+    /* Make sure we are in the right view for mask editing */
+    sc->view = SC_VIEW_CLIP;
+  }
+
   WM_event_add_notifier(C, NC_SPACE | ND_SPACE_CLIP, NULL);
 
   return OPERATOR_FINISHED;

source/blender/makesrna/intern/rna_space.c

@@ -2105,6 +2105,13 @@ static void rna_SpaceClipEditor_clip_mode_update(Main *UNUSED(bmain),
 {
   SpaceClip *sc = (SpaceClip *)(ptr->data);
 
+  if (sc->mode == SC_MODE_MASKEDIT && sc->view != SC_VIEW_CLIP) {
+    /* Make sure we are in the right view for mask editing */
+    sc->view = SC_VIEW_CLIP;
+    ScrArea *sa = rna_area_from_space(ptr);
+    ED_area_tag_refresh(sa);
+  }
+
   sc->scopes.ok = 0;
 }