UI: #334 add config page language setting (#374)

* UI: #334 add config page language setting

* temporary remove logout button

* Unify fullscreen view class for dialog expanded and settings view

- Replace dialog-expanded and settings-view with single fullscreen-view class
- Update ResponsiveDialog to use fullscreen-view class
- Update CalendarLayout to use fullscreen-view class for settings view
- Consolidate CSS rules in Menubar.styl to use fullscreen-view
- Update test cases to use new class name

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Co-authored-by: Lê Nhân Phụng <lenhanphung@Phung-Mac-M4.local>

src/components/Dialog/ResponsiveDialog.tsx

@@ -149,9 +149,9 @@ function ResponsiveDialog({
 
   React.useEffect(() => {
     if (isExpanded) {
-      document.body.classList.add("dialog-expanded");
+      document.body.classList.add("fullscreen-view");
     } else {
-      document.body.classList.remove("dialog-expanded");
+      document.body.classList.remove("fullscreen-view");
     }
   }, [isExpanded]);