SurroundingRectangle supports *mobjects

[MrDiver]

Quickfix for SurroundingRectangle to add the functionality to surround multiple objects without creating an extra VGroup

[Boris-Filin]

Hello there!
We have to do some OSC for uni (I know, I know...), and I would like to take a swing at this fix.
I am thinking that this could be done by creating a temporary VGroup under the hood inside SurroundingRectangle itself.
As for syntaxis, I think it would make most sense to add a classmethod such as "mobjects" that would be separate to the main constructor, while still providing the necessary functionality.

box = SurroundingRectangle.mobjects([quote, title], color=YELLOW, buff=MED_LARGE_BUFF)

Would you mind if I take this issue?
I'd appreciate any notes you have on the above ideas.

[JasonGrace2282]

Closed by #3964