...docking window

Missed this in recent rework concerning key input events in
SidebarDockingWindow, tdf#125525 Allow shortcut keys from sidebar
docking window.

Change-Id: I53906251918874d2613795cb06a3e6ef07509bd8
Reviewed-on: https://gerrit.libreoffice.org/73192
Tested-by: Jenkins
Reviewed-by: Jim Raykowski <raykowj@gmail.com>