Sticky / fixed / frozen rows (and columns)

[buschtoens]

With sticky rows we could implement headings for sub-sections of tables. These sticky rows would look act like normal table rows, but would stick to the top of the view port, when scrolling. Think of iOS contact book:

When we support horizontal scrolling (#284), we could also support sticky columns:

This might be a bit utopian, but I think it would make for great feature and awesome UI. I'm keen on input from users here! :)

[trdp30]

We are in need of this feature.
Where are you guys in this feature?