fdo#59396 Remove duplicate footer entries in "BrightBlue" Impress template

This also removes an English text in the Master page: "Click here to edit..." and replaces it with a placeholder

It would be nice to have this in 4.0 branch also.

Change-Id: I1aadc20aa9916e40bbaf1b6f66ec58dfd02a35bb
Reviewed-on: https://gerrit.libreoffice.org/1725Reviewed-by: Noel Power <noel.power@suse.com>
Tested-by: Noel Power <noel.power@suse.com>
Signed-off-by: Noel Power <noel.power@suse.com>