The `alt-tab` keybinding doesn’t work properly under the `AgentPanel`
context on Windows and certain Linux distros, so `alt-l` is provided as
an alternative for the same action.
In my testing, I could not trigger the `AcpThread > Editor` context, but
I added the keybinding there too just in case.
Closes#48347.
Release Notes:
- Added an alternate keybinding for `agent::CycleFavoriteModels` on
Linux and Windows to prevent conflict with global app switcher
Kunall Banerjee
36111c6cbf