7110: typo on AppData file,  improve description; 7092 7110: update template and french translation

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@23302 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
7110: alternate possessive form, which will limit issues on parsing

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@23303 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
either fix apostrophe into 'data/tips.xml.in' to avoid message like 'byte 0xd0 in position 7', or remove unicode_literals from po/update_po.py

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@23304 4ae1f11a-8b86-4847-b8af-ab372f36d1fd