Group panels under the same tab, make a group of panels appear or go away when selecting different tabs
In my picture, I have two panels "Frame.io" and "Effects Control" put together as two tabs in the same panel area. Currently, you can switch between them to hide one panel when viewing the other and save space.
Picture being able to put the "Effects" panel with the "Effects Control" panel, grouped together under one tab, so that you can hide and reveal both of them together. As in, if you select the "Frame.io" panel, both "Effects Controls" and "Effects" would hide and "Frame.io" would be visible. Then, you select the effects tab group and both "Effects Controls" and "Effects" become visible as one group of panels under the same tab.