Moved populateTags to be done on the main file list.
This prevents the public file list to go through the same code and cause
an error when there is no user.

Added oc:tags and oc:favorites in PROPFIND response.
It is possible to update them with PROPPATCH.
These properties are optional which means they need to be requested
explicitly

Since the thumbnail is now in a div, the code that tries to change the
thumbnail have been adapted here as well.

shift actions to the left a bit to account for right shift due to favorites action, not not overlap with size info