clean up permission list in steering backend, to remove doubles / old items

When testing the assignment of permissions, I noticed that in steering's backend interface some permissions show up twice in the list, or appear as having two different names. This concerns the following fields:

• the program | note | topic field (it appears as "topic" and as "topics")
• the program | note | language field appears twice
• the program | show | can edit default media source is the same as program | show | can edit default playlist id field, the one with the old name "...playlist id field" should be removed
• items named userprofile | ... (old namings) appear in the list as well as program | cba | ... (those are the new namings for the "userprofile" - items with old name should be removed)

It is likely the doubles are a result from changes that have been made in the models. They should be removed to not confuse the users.