Bugfix: Check that the tag name exists before using it
Tagging: Use animation when showing/hiding tags
Tagging: Fix bump effect in hiding/showing tags animation
Tagging: Misc styling changes
Tagging: Fix sorting tables with tags

Since tags tend to consume a lot of space, we were adding them in
separate rows in the language table, but this broke table sorting since
the tag rows are sorted independently.

Now we keep the tags in a hidden cell of the respected row, and insert
the rows dynamically just after the table is sorted, and remove them
before sorting the table again.
Tagging: Swap the placement of Add tag and Hide tags

To be consistent with the project page
Bugfix: Don't add extra fields for parent dir item on stats tables
Cleanup: The data to be shown on templates must be retrieved on views
Tagging: Add support for filtering project TPs using tags

Fixes bug 3037
Tagging: Use Select2 in tag filtering UI

Fixes bug 3038
Tagging: Align the tags to progress bar column

Instead of letting the browser calculate the width of the tags cell, we
calculate it ourselves so that it does not change when whether tags are
visible or not.
Tagging: Use AJAX for filtering TPs in project overview

Fixes bug 3070
Tagging: Hide tags by default & save their visibility state
Tagging: Add a way for removing a tag from a TP

Fixes bug 3054
Tagging: Add a way for removing a tag from a TP in project overview

Fixes bug 3076
Tagging: Don't reload the whole page when adding a tag to a TP in Project overview

Fixes bug 3075
Tagging: Don't reload the whole page when adding a tag in TP overview

Fixes bug 3074