[code style] fix com_banners admin controllers
Fixing 'Trying to get property of non-object' error in JUpdaterExtension
Merge pull request #2953 from phproberto/cs-01

[code style] fix com_banners admin controllers
Committing new lang string from PR #2497
Updating en-GB xml(s) version
Updating installation lang files: ca-ES, es-ES, et-EE, hr-HR, sy-IQ