Feature request: namespace prefixes collapser in left sidebar and for tags

[candideu]

I really love these utilities! The namespace collapser is one that I really needed, and I'm glad I stumbled upon your project.

My only suggestions are the following:

Making the collapser available in the left sidebar:

Activating the collapser for tags

Currently, the presence of a hashtag at the start of a page name (for tags) prevents the collapsing action. I use hashtags/tags for their distinct styling, but would benefit from the collapsing as well.