Handle all of the tab opening request in one section

Improves clarity
Add an option to never jump at all

This is useful if you want to run tests from the SUT and just want to
see possible error messages.

A nice alternative is available, if you have test and sut buffers next
to each other: Jump to the window with the tests, run MakeGreen(), turn
on cursorline, and return.  Or similar procedures.