Group staging parts

[CuAnnan]

At present, parts are only grouped in staging via whether they were symmetrically added. You can break that grouping, by clicking and dragging, but there's no way to unbreak that grouping and there's no way to add more parts to a group.

Please add a feature to allow us group parts together. Instead of having four pairs of Sepratrons, I should be able to have one instance of 8 which I can click or drag around. This would reduce the size of my staging leg for each by three parts.

Staging is such a pain in the arse, what with adding a subassembly almost always messing up everything, this one addition would make it eminently less frustrating

[ringerc]

Yeah ... the combo of subassemblies and staging has bought my launches to grief repeatedly.

Stage 1 ... firing ... burn .... separation in three, two, one, WHAM, the nose-mounted lander just decoupled, fell off and went tumbling away. Whoops. That wasn't mean't to happen. Hope Jeremiah's OK in there.