Disabled menu entries are used as context menu titles

Context menu titles should be flagged differently than disabled entries. Titles are rendered bigger (`font-size: 12px;`) and that makes disabled entries bigger too, affecting `Undo` and `Redo` in the `Edit` menu.

The issue identifies the context-menu title and disabled-entry rendering, especially Undo and Redo in the Edit menu; begin by reproducing that menu and tracing where those entries are classified and styled. Done means titles remain larger while disabled Undo and Redo entries retain normal sizing, with the behavior checked in the Edit menu.

Written by the indexing model from the issue text.