fixed history modal, topic progress now sticky to last post, others...

edit heatmap is back, date/edit links now grey

![screen shot 2013-09-14 at 11 31 50 pm](https://f.cloud.github.com/assets/1681963/1144638/857713a4-1db7-11e3-85d4-e7246e58579f.png)
![screen shot 2013-09-14 at 11 31 17 pm](https://f.cloud.github.com/assets/1681963/1144639/857baec8-1db7-11e3-8c66-d50374126f71.png)