Deselect all auto removed groups in drag & drop operations.

This fixes strange corner case that causes enabling
the grouping button when no visible shape is selected.

frontend/src/uxbox/main/data/shapes_impl.cljs

@@ -154,7 +154,8 @@
   [state {:keys [group] :as shape}]
   (if-let [group' (get-in state [:shapes group])]
     (if (empty? (:items group'))
-      (dissoc-shape state group')
+      (-> (dissoc-shape state group')
+          (update-in [:workspace :selected] disj (:id group')))
       state)
     state))
 

frontend/src/uxbox/main/ui/workspace/sidebar/layers.cljs

@@ -84,7 +84,8 @@
     :path i/curve
     :rect i/box
     :text i/text
-    :group i/folder))
+    :group i/folder
+    nil))
 
 ;; --- Shape Name (Component)