fix bug 802041 - allow all users to change the translation sources of wiki documents.
no idea what I'm doing
Only show the parent form input when editing a translation.
Set more values to make saving succesful.

PS: What's the difference between parent and parent_topic?
Merge pull request #1222 from jezdez/bug802041

allow all users to change the translation sources of wiki documents
fix bug 705470 - Allow more specific comment for reverts
Merge pull request #1247 from darkwing/revert-comment-705470

fix bug 705470 - Allow more specific comment for reverts