Merge branch 'edition-form-rights' into 'master'

Ensure element rights are available in edition form

Closes #821

See merge request !1079

vue/Element/EditionForm.vue

@@ -231,6 +231,22 @@ export default {
         this.deleteLoading = false
       }
     }
+  },
+  watch: {
+    element: {
+      immediate: true,
+      handler (element) {
+        if (!element.id) return
+        /*
+         * Do not retrieve the element again if it already exists in the store,
+         * unless it lacks some of the attributes only available from RetrieveElement.
+         * Some elements in the store can come from list endpoints such as those of the children tree.
+         * This ensures there are no strange behaviors where some actions are only sometimes disabled when they shouldn't,
+         * or some element attributes are not displayed at all.
+         */
+        if (!element.rights) this.$store.dispatch('elements/get', { id: element.id })
+      }
+    }
   }
 }
 </script>