As a developer I would like to have more consistent language keys for activities

• Type: Story
• Status: Closed
• Priority: Minor
• Resolution: Completed
• Affects Version/s: 6.2.0 CE M5
• Fix Version/s: 6.2.0 CE M5
• Component/s: Social Networking, Social Networking > Activities
• Labels: None
• Epic/Theme:
  • Quick_Win

Recently a number of trash related activities have been added to models that didn't have activities before. By adding the new language keys, now we there are keys that contain the object of the activity (i.e. activity-journal-folder-move-to-trash) while others (the old ones) don't (e.g. activity-journal-move-to-trash). We should make these keys more consistent by adding the missing object to the old ones. This also conforms to another improvement where we split activity interpreters so that they only handle one type (e.g. from MBActivityInterpreter we created two: MBMessageActivityInterpreter and MBThreadActivityInterpreter).