fix lazy initialization of the sidebar

src/public/javascripts/services/app_context.js

@@ -34,7 +34,7 @@ import utils from "./utils.js";
 import treeService from "./tree.js";
 import SidePaneContainer from "../widgets/side_pane_container.js";
 import ZoomService from "./zoom.js";
-import SidepaneToggles from "../widgets/sidebar_toggle.js";
+import SidePaneToggles from "../widgets/side_pane_toggles.js";
 
 class AppContext {
     constructor() {
@@ -188,9 +188,9 @@ class AppContext {
 
         $centerPane.after(rightPaneContainer.render());
 
-        const sidebarToggleWidget = new SidepaneToggles(this);
+        const sidePaneTogglesWidget = new SidePaneToggles(this);
 
-        $centerPane.after(sidebarToggleWidget.render());
+        $centerPane.after(sidePaneTogglesWidget.render());
 
         this.components = [
             new Entrypoints(),
@@ -199,7 +199,7 @@ class AppContext {
             leftPaneContainer,
             ...centerPaneWidgets,
             rightPaneContainer,
-            sidebarToggleWidget
+            sidePaneTogglesWidget
         ];
 
         if (utils.isElectron()) {

src/public/javascripts/widgets/side_pane_toggles.js

@@ -28,7 +28,7 @@ const TPL = `
 </div>
 `;
 
-export default class SidepaneToggles extends BasicWidget {
+export default class SidePaneToggles extends BasicWidget {
     constructor(appContext) {
         super(appContext);
 

src/public/javascripts/widgets/tab_aware_widget.js

@@ -78,6 +78,10 @@ export default class TabAwareWidget extends BasicWidget {
     }
 
     lazyLoadedListener() {
+        if (!this.tabContext) { // has not been loaded yet
+            this.tabContext = this.appContext.getActiveTabContext();
+        }
+
         this.refresh();
     }
 }