Allow to have multiple Docking instances

[filly82]

I'd love to be able to have multiple Docking Widgets, e.g. within Tabs (or Row or Column) but it fails with

Bad state: It is not allowed to share MultiSplitViewController between MultiSplitView instances.

Haven't found a solution to provide my own MultiSplitViewController, which I guess would solve the problem

[caduandrade]

Hi @filly82!

Apologies for the delay. Are you wanting to drag panels between different instances of Docking?

[filly82]

I would not need it for my purposes right now but sure it would be a nice to have