* Fix more menu focus issue when focused with no hover.
* Use a js based solution for focus
* Return focus to the menu trigger when closing the menu with Escape
Keep the keyboard-focus marker set while a row/section-header menu is open
(focus is then in the portaled popover, outside the element). This keeps the
trigger revealed so the menu's own focus restoration lands on it when closed
with Escape, instead of dropping to <body>.
* test: cover keyboard-focus reveal of the room list hover menus
Adds unit tests that focus a room row / section header via the keyboard
(:focus-visible on mount) and assert the hover menu is revealed, then cleared
when focus leaves. Brings diff coverage of the focus handlers to 100%.
David LangleyandGitHub
c33a159334