Define different styling for hours/minutes outside min and max values

[Lipata]

Is your feature request related to a problem? Please describe.

When there is a minValue and maxValue defined in the igx-time-picker, there is no indication and it is not possible to close the dialog, when trying to set a date that is outside the defined minimum or maximum.

Describe the solution you'd like

The igx-time-picker should have some disabled styling for the hours/minutes that are outside the minValue/maxValue.