Separate hover and stay time configuration

Currently, this package allows setting hover and stay time via single param. IMO it makes sense to allow configuration of hover and stay times each via own params. E.g., I'd prefer having a bigger delay on hover and no delay at all on blur.

Start by locating the current single configuration parameter used for hover and stay timing. Separate those settings so hover and blur delays can be configured independently, and verify that both behaviors honor their respective values.

Written by the indexing model from the issue text.