UI accelerator keys missing in sections Table Design and Slide Transition of task pane.

I chose characters that are not used as menus keys.

Change-Id: Ide70e4703b0e27e001d487e07fa05fb14481cad2
Reviewed-on: https://gerrit.libreoffice.org/629Reviewed-by: Miklos Vajna <vmiklos@suse.cz>
Tested-by: Miklos Vajna <vmiklos@suse.cz>