Add the possibility to move tasks without drag and drop

assets/js/src/Popover.js

@@ -148,4 +148,8 @@ Kanboard.Popover.prototype.afterOpen = function() {
     this.app.datePicker();
     this.app.autoComplete();
     this.app.tagAutoComplete();
+
+    new Vue({
+        el: '#popover-container'
+    });
 };