[FEATURE] Add feature to hide/show the layer list.

NormanPCN

More viewer space is always a good thing. Imerge could use a bit more horizontal space (mag views).

The layer list is something we do not need quick access to, so we don't really need it instantly available most of the time. We live our edit lives mostly in the layer inspector and the viewer. The top toolbar has plenty of space to have a button to toggle the layer list.

Triem23

Or even an arrow/triangle icon to open/close (twirl) that panel?