Shortcut to set inPoint/outPoint of multiple layers as a group

It would be helpful to have additional shortcuts (eg. Shift + [ and Shift + ]) to move layers as a selection group.

Currently, if a selection of layers have different inPoints, and you press [, the inPoint of every layer is set to the CTI. It would be incredibly helpful to be able to add a modifier this shortcut, so that the earliest inPoint of the selection is set to the CTI, and all other inPoints remain relative to that earliest inPoint. Same with the outPoint, based on the latest outPoint.

Even better if this could also work for inPoint/outPoint trimming: if Shift is held (eg. Shift + Alt + [), inPoints/outPoints are trimmed with relative time, based on the earliest inPoint or latest outPoint.