Changes for launch

Change-Id: I2c8191c09d8aad06fe62a4a9689183cd85e3ee7c
Tidying up language strings

Change-Id: Ic6734dea584a89f9ef51959655768b9ffc4535c5
Merge branch 'my_mods' of github.com:Pete-learningpool/moodle-mod_certificate into my_mods
Tidy ing up layout positions

Change-Id: Ife25f7d42cd1d980bc647864d7d85e28bb0e981f