added "switch to mobile version" button to web edition, closes #1889

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "trilium",
-  "version": "0.48.3",
+  "version": "0.48.4",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {

src/public/app/services/entrypoints.js

@@ -172,6 +172,12 @@ export default class Entrypoints extends Component {
         utils.reloadFrontendApp("Switching to desktop version");
     }
 
+    async switchToMobileVersionCommand() {
+        utils.setCookie('trilium-device', 'mobile');
+
+        utils.reloadFrontendApp("Switching to mobile version");
+    }
+
     async openInWindowCommand({notePath, hoistedNoteId}) {
         if (!hoistedNoteId) {
             hoistedNoteId = 'root';

src/public/app/widgets/buttons/global_menu.js

@@ -60,6 +60,11 @@ const TPL = `
             <kbd data-command="showBackendLog"></kbd>
         </a>
 
+        <a class="dropdown-item switch-to-mobile-version-button" data-trigger-command="switchToMobileVersion">
+            <span class="bx bx-empty"></span>
+            Switch to mobile version
+        </a>
+
         <a class="dropdown-item" data-trigger-command="reloadFrontendApp" 
             title="Reload can help with some visual glitches without restarting the whole app.">
             <span class="bx bx-empty"></span>
@@ -103,9 +108,11 @@ export default class GlobalMenuWidget extends BasicWidget {
         this.$widget.find(".show-about-dialog-button").on('click',
             () => import("../../dialogs/about.js").then(d => d.showDialog()));
 
-        this.$widget.find(".logout-button").toggle(!utils.isElectron());
+        const isElectron = utils.isElectron();
 
-        this.$widget.find(".open-dev-tools-button").toggle(utils.isElectron());
+        this.$widget.find(".logout-button").toggle(!isElectron);
+        this.$widget.find(".open-dev-tools-button").toggle(isElectron);
+        this.$widget.find(".switch-to-mobile-version-button").toggle(!isElectron);
 
         this.$widget.on('click', '.dropdown-item',
             () => this.$widget.find("[data-toggle='dropdown']").dropdown('toggle'));