fdo#59427 next step template menu: change string New Document.. to Manage

TODO: uno:NewDoc sh/could be changed to, but lets fit that in future
improvements/changes in this area

Change-Id: I5e926afbd8cb714962091a973167c928adf0225a
Reviewed-on: https://gerrit.libreoffice.org/6659
Reviewed-by: Björn Michaelsen <bjoern.michaelsen@canonical.com>
Tested-by: Björn Michaelsen <bjoern.michaelsen@canonical.com>