Add some aria-labels for use with fastlane snapshot (#3293)

src/components/ha-menu-button.ts

@@ -17,6 +17,7 @@ class HaMenuButton extends LitElement {
   protected render(): TemplateResult | void {
     return html`
       <paper-icon-button
+        aria-label="Sidebar Toggle"
         .icon=${this.hassio ? "hassio:menu" : "hass:menu"}
         @click=${this._toggleMenu}
       ></paper-icon-button>

src/components/ha-sidebar.ts

@@ -125,6 +125,7 @@ class HaSidebar extends LitElement {
         ${this._externalConfig && this._externalConfig.hasSettingsScreen
           ? html`
               <a
+                aria-label="App Configuration"
                 href="#external-app-configuration"
                 tabindex="-1"
                 @click=${this._handleExternalAppConfiguration}

src/panels/lovelace/hui-root.ts

@@ -232,7 +232,7 @@ class HUIRoot extends LitElement {
                   >
                     ${this.lovelace!.config.views.map(
                       (view) => html`
-                        <paper-tab>
+                        <paper-tab aria-label="${view.title}">
                           ${this._editMode
                             ? html`
                                 <ha-paper-icon-button-arrow-prev