Merge pull request #1635 from hughrun/remote-follow

Remote follow

bookwyrm/static/js/bookwyrm.js

@@ -411,6 +411,21 @@ let BookWyrm = new class {
         }
     }
 
+    /**
+     * Display pop up window.
+     *
+     * @param {string} url Url to open
+     * @param {string} windowName windowName
+     * @return {undefined}
+     */
+    displayPopUp(url, windowName) {
+        window.open(
+            url,
+            windowName,
+            "left=100,top=100,width=430,height=600"
+        );
+    }
+
     duplicateInput (event ) {
         const trigger = event.currentTarget;
         const input_id = trigger.dataset['duplicate']