Please consider update for 42.3 (along with the rest of xfce probably)
Requesting this specifically because it fixes ugly annoyances so I
already run this version on 42.2.

- Update to 0.8.3.
* Fix incorrect initial position of a drop-down window under
Unity.
* min-height/width CSS properties not available in old GTK
versions.
* Remove redundant set_window_geometry_hints() call.
* Add Help button to Set Title dialog.
* GtkColorButton show-editor property only available starting
with GTK 3.20.
* Watch for screen size changes to update drop-down window size
or position accordingly. Size change signal is emitted when
monitor resolution is changed or another monitor is connected.
* Make slim tabs even more slim.
* Translation updates: Chinese (China), Lithuanian, Thai.
- Changes in 0.8.2.
* Add hidden option MiscSlimTabs to override huge gtk3 tabs
style.
* Temporarily show menubar with F10 even if it's hidden.
* Add "Run custom command instead of shell" feature.
* Fix segfault on dragging last window tab to another window.
* Add option for ambigouos-width characters (narrow/wide).
* Don't show palette when editing palette colors in preferences.
* Fix move dropdown window to monitor with pointer behavior.
* When un-closing a tab, set it active if it was active when it
got closed.
* Set locale as vte encoding in case encoding is not set in prefs
(support for running 'LANG=charset xfce4-terminal').
* Allow to specify text selection background color.
* Allow to select system-wide monospace font in preferences.
* Fix Alt+n shortcuts when starting with several tabs.