Rework "--tab" and "--window" behavior (Issue #13)
Changes the behavior to the one described in the issue which is more consistent (except for the behavior of "--tab" when there is an active window, since that change might interfere with existing workflows and it would remove functionality).
Additionally, "--tab" no longer needs to be the first option for a new tab to be added in an existing window.
MR !25 (merged) Issue #13 (closed)
Edited by Sergios - Anestis Kefalidis