Use $this->msg instead of $context->msg

Change-Id: Id15bd5cb3c035a74799a17e3c64c6ec74af1c693
Localisation updates from http://translatewiki.net.

Change-Id: I7c57cf5c94bfe490e009c4867b6c8f2be17e1474
Use TitleCase for job names

* massmessageJob became MassMessageJob
* massmessagesubmitJob became MassMessageSubmitJob

Change-Id: I3e87d77d0d96569faca7c6704ed42f429e36c1e3