Lock/UnLock with multiple selected

[Joen-UnLogick]

Description

When selecting more than one file in the project view and then opening the context menu and locking/unlocking will only affect one.

Steps to Reproduce

1. Select two versioned files in Unity
2. Right click and "Request Lock"

Expected behavior: [What you expect to happen]

I expect both to be locked.

Actual behavior: [What actually happens]

Only one is locked.

Reproduces how often: [What percentage of the time does it reproduce?]

100%

Additional Information

Just look at all of Selection.objects instead of only Selection.activeObject

[ThomasAunvik]

Kind of similar to #780