Updated mediawiki/extensions
Project: mediawiki/extensions/GWToolset  a186d43bd5ac5f7f69e2635e0eec3f55121a0f04

Added more credits to the English i18n file

Change-Id: Ibf9a7a31457de282570902adc7b8af5f94758e3a

Clarify messages about identical files and titles

Rephrased them to be less repetitive and more easily
readable and translatable.

Change-Id: I0f733a0a6d395c5869bae8d03b4b288539e4aa4e