Options: #182, #183

Previously, a command like xfce4-terminal --tab would add a tab in the existing window. At the same time xfce4-terminal --window --tab would open 2 new windows, one of which would have 2 tabs. Now xfce4-terminal --window opens a single new window if there is an active instance of xfce4-terminal.

Issue #182 (closed)

--active-tab doesn't behave as expected when adding tabs to an active window

Issue #183 (closed)