NotebookbarTabControl

Use Ctrl+Right/Left arrow to move focus among current notebookbar tab
control tab title, hamburger menu, and shortcuts tool box.

Change-Id: Ia7b22ff03fce7148eb411cfe9eaabc247b737cb5
Reviewed-on: https://gerrit.libreoffice.org/63875
Tested-by: Jenkins
Reviewed-by: Jim Raykowski <raykowj@gmail.com>