Refresh file list when there are queued snapshots (#697)

* add destroy hook

* refresh details modal in interval

* refactor to refresh assets list

* disable create snapshot button when there is a pending snapshot

web-types.json

@@ -26,6 +26,20 @@
             "required": false
           }
         },
+        {
+          "name": "ld-select",
+          "description": "The content element(s) to select from the fetched content, for example `#main-content`",
+          "value": {
+            "required": false
+          }
+        },
+        {
+          "name": "ld-interval",
+          "description": "Automatically fetches the content of the given URL at the given interval, in seconds",
+          "value": {
+            "required": false
+          }
+        },
         {
           "name": "ld-fire",
           "description": "Fires one or more events once a behavior, such as ld-fetch or ld-form, is finished",