Allow to search through rooms

[babolivier]

I'm in a lot of rooms, so sometimes it's hard to find the exact room I want to tag. Also Ctrl+F seems to only work on the rooms that are currently displayed on my screen (or ones close to them), propably because of some Angular magic, so it doesn't really help here.

It would be nice if there was a search bar to search through rooms based on their name/ID (either one search bar per column or a global one).