Left Menu: show with shortcut when pinned but hidden (#3170)

Previously the shortcut Ctrl+Shift+M only worked when the menu wasn't
pinned.

But being able to show the menu is also very handy when the menu was
pinned but hidden because the screen is narrowed.

Signed-off-by: Jimmy Tanagra <jcode@tanagra.id.au>

bundles/org.openhab.ui/web/src/components/app.vue

@@ -615,9 +615,7 @@ export default {
             break
           case 77: // M for menu
             const leftPanel = this.$f7.panel.get('left')
-            if (leftPanel.visibleBreakpointDisabled) {
-              leftPanel.opened ? leftPanel.close() : leftPanel.open()
-            }
+            leftPanel.opened ? leftPanel.close() : leftPanel.open()
             break
           default:
             return