Timepicker not to block whole hour when using unselectable-times by default.

[franciscoh017]

Description

While using granularity for the minutes and trying to create a scheduler functionality on an app i'm working on, i found out that when adding an hour on the unselectable-times, the whole hour is blocked and the only way to unlock the hour is to try to find out which minutes from that hour is available by selecting them from the minutes drop down.

As an user i would like the hour to be blocked only if all the minutes of that hour are included in unselectable times, taking in account the granularity. However, if there are still available minutes from that hour at least i would like a programable way to enable or disable it.

See codepen below:
https://codepen.io/franciscoh017/pen/YzwLNdM?editors=1010

Why Buefy need this feature

I would make more sense in terms of usability for the users to be locked out from the hours after all the minutes of that hour are unselectable. Also, users tend to select hout first by the way the component elements are sorted.