[PM-358] Bump electron to 24 and node to 18 (#5205)

Upgrade Electron to version 24, node to 18 and npm to 9. Electron changed to using node 18 in 23, with node 18 using npm 9 as default.

There doesn't seem to be any breaking changes except the deprecation of Windows 7, 8.1, and Server 2012. A somewhat undocumented breaking change was that elements in the title bar are now draggable which broke the account switching selector. Resolved by adding a no-drag css rule.

- electronjs.org/blog/electron-22-0
- electronjs.org/blog/electron-23-0
- electronjs.org/blog/electron-24-0

apps/desktop/src/scss/header.scss

@@ -31,6 +31,9 @@
   }
 
   app-account-switcher {
+    // Electron will mark elements in the title bar as draggable so that the window can be moved. This
+    // disables the click events. To restore the click functionality, we mark this element as no-drag.
+    -webkit-app-region: no-drag;
     justify-self: end;
     height: 100%;
   }

apps/desktop/src/scss/pages.scss

@@ -272,13 +272,3 @@
     }
   }
 }
-
-// TODO: Remove after 2023.4 release
-.os-deprecated {
-  margin-top: 20px;
-  width: 500px;
-}
-
-#lock-page {
-  flex-direction: column;
-}