such as smartclient do
http://www.smartclient.com/#editByCell
We do not plan to provide it as standard feature, but the same menu can be already created through a public API
Yes, but I think the best way is to provide this feature, and fix the getState and setState for hidden/frozen
We will publish a short tutorial about how such menu can be created on the next wee.
and fix the getState and setState for hidden/frozen
getState, setState already works with hidden columns