systemed/iD — pull request #2089 by mourner (2014-01-08 17:33:53+00:00)
Title: Better hover experience 

- avoid excessive tooltip show/hide trigger by using mouseenter/leave instead of mouseover/out
- throttle hover for less epileptic experience and better performance (otherwise the sidebar flashes so fast that it makes no sense while distracting the user and lagging due to heavy sidebar construction