🐛 Ensure :shapes attr on importing an svg with an empty group

This commit should not not be backported to, because the affected
code is already refactored and the issue is already fixed on develop
branch

frontend/src/app/main/data/workspace/shapes.cljs

@@ -57,6 +57,11 @@
                         cts/default-frame-attrs
                         cts/default-shape-attrs)
 
+        default-attrs (if (or (= :group (:type attrs))
+                              (= :bool (:type attrs)))
+                        (assoc default-attrs :shapes [])
+                        default-attrs)
+
         selected-non-frames
         (into #{} (comp (map (d/getf objects))
                         (remove cph/frame-shape?))