0.830

Implemented 'bulk add horizontal joints' but it's not exactly user friendly right now.

Even though it says 'bulk add horizontal joints', the way I went about creating a solution is actually more universal. It looks for common number groupings in a rigid body's name and then user selects which 'grouping' in a name means that they belong in a chain to be joined together. It's actually quite an ingenious solution if I do say so myself.

Will be focused on cleaning up the UI, making things more understandable regarding everything joint-related in the coming days.