Allow archiving from the wiki page and hide archived page from the wiki index/overview

[marc-farre]

1/ Add the "Move to archive" menu item:

2/ Hide archived wiki pages

If archived from the stream, don't display them in the wiki index/overview.

[luke-]

Hmm, we only have an “Archived” status. This must be the same in the module and in the stream.
If you only want to hide content from the stream, you have to use the “Hide in Stream” flag.

[marc-farre]

@luke- Sorry, I think I didn't explain well. I also renamed the issue title which was confusing.

1/ If we want to archive a wiki page, we can only do it from the "Stream" page. I think we should be able to do it when viewing the wiki page.

2/ When a wiki page is archived, it shouldn't be displayed in the Wiki Index / Overview.

[luke-]

@marc-farre Ah ok, understand. Sounds good!