Disabled the badge decoration in the Explorer.

Ref: eclipse-theia/theia#8709
Signed-off-by: Akos Kitta <kittaakos@typefox.io>

arduino-ide-extension/src/browser/theia/navigator/navigator-tab-bar-decorator.ts

@@ -0,0 +1,21 @@
+import { injectable } from 'inversify';
+import { WidgetDecoration } from '@theia/core/lib/browser/widget-decoration';
+import { NavigatorTabBarDecorator as TheiaNavigatorTabBarDecorator } from '@theia/navigator/lib/browser/navigator-tab-bar-decorator';
+
+/**
+ * To silent the badge decoration in the `Explorer`.
+ * https://github.com/eclipse-theia/theia/issues/8709
+ */
+@injectable()
+export class NavigatorTabBarDecorator extends TheiaNavigatorTabBarDecorator {
+
+    onStart(): void {
+        // NOOP
+    }
+
+    decorate(): WidgetDecoration.Data[] {
+        // Does not decorate anything.
+        return [];
+    }
+
+}