### mate-applets 1.28.1

* Compute screen height properly when not in X11
* Remove GtkSourceView dependency as we no longer use it
* Replace GtkSourceView with GtkTextView
* Do not call x11 functions when not in x11
* ci: try to fix cannot load such file -- faraday/net_http (LoadError)
* ci: use pip3 install not pip install for Travis
* CI: sudo was not used in prior attempt
* CI: 3ed try to fix start of jobs
* CI: 2nd attempt to fix start of builds
* ci: fix starting the builds as per error message
* CI: travis fixes needed elsewhere also needed here