Buffer not active after closing it in another tab

[tiagovla]

To reproduce:

• open two buffers
• <c-w>s <c-w>T
• close one of those buffers

[jtackaberry]

This is one of those "noticed within 60 seconds" bugs for me. I was experimenting with incorporating tabs into my workflow and immediately found Scope to address my first issue -- thanks! -- but this bug is definitely the next hurdle. Hopefully it can be fixed.

[uwla]

Maybe introduce a ScopeBufferDelete so that, instead of calling bdelete, we call this command (directly or via key maps to make easier) which then scope.nvim can deal with the buffer deletion without messing up other tabs