Add hide function for gantt and strategy roadmap views to bulk editing for epics and features

Currently you can select an individual epic or feature to "remove from gantt" and/or "remove from roadmap" to hide that specific record from the view

If you have many epics/features in either of these views, and you only want to focus on a few select records, it is time consuming to manually hide each record

It would be helpful and more efficient to make these options available in bulk editing to quickly select which records to show/hide in the gantt and strategy roadmap views