Set bake button to "Loading..." when an autobake is started

src/web/App.mjs

@@ -157,6 +157,8 @@ class App {
                 action: "autobake",
                 data: this.manager.input.getActiveTab()
             });
+
+            this.manager.controls.toggleBakeButtonFunction(false, true);
         } else {
             this.manager.controls.showStaleIndicator();
         }