Fixed jQuery exception when loading graph

src/editor/js/components/editor.css

 div#ks-editor #sidepanel {
     resize: horizontal;
     overflow: auto;
-    min-width: 50px;
+    min-width: 250px;
     max-width: 40%;
     height: inherit;
     margin: 0.3rem;
     padding: 0.25rem;
 
+    background-color: white;
     border: 1px lightgrey solid;
     border-radius: 5px;
 

src/editor/js/components/editor.tsx

@@ -30,6 +30,8 @@ export class Editor extends React.PureComponent<
 
     constructor(props: InferType<typeof Editor.propTypes>) {
         super(props);
+        this.loadGraph = this.loadGraph.bind(this);
+
         // Set as new state
         this.state = {
             state: undefined,