Gizmo: hide 2D gizmos while transforming

Hide gizmos in the sequencer & UV editor while transforming.

source/blender/editors/transform/transform_gizmo_2d.c

@@ -32,6 +32,7 @@
 #include "DNA_view3d_types.h"
 
 #include "BKE_context.h"
+#include "BKE_global.h"
 #include "BKE_layer.h"
 
 #include "RNA_access.h"
@@ -70,6 +71,10 @@ static bool gizmo2d_generic_poll(const bContext *C, wmGizmoGroupType *gzgt)
     return false;
   }
 
+  if (G.moving) {
+    return false;
+  }
+
   ScrArea *area = CTX_wm_area(C);
   switch (area->spacetype) {
     case SPACE_IMAGE: {