Installs python-qt4 in whonix-ws-14

The `python-qt4` package is required for the GUI feedback integration,
so status messages can be displayed to the user. The package isn't
present by default, and we need it in sd-journalist. Since we don't
have SD TemplateVMs yet, we're adding the package to the base template,
installing in `whonix-ws-14`, rather than `sd-journalist`, to get
persistence for the package.

dom0/sd-journalist.sls

@@ -36,8 +36,12 @@ require:
     - group: root
     - mode: 644
 
-# Temporary workaround to bootstrap Salt support on target.
-qvm-run -a whonix-ws-14 "sudo apt-get install -qq python-futures":
+# Temporary workarounds for sd-journalist:
+#
+#   * python-futures required bootstrap Salt support
+#   * python-qt4 required for sd-process-feedback GUI integration
+#
+qvm-run -a whonix-ws-14 "sudo apt-get install -qq python-futures python-qt4":
   cmd.run
 
 # When our Qubes bug is fixed, this will *not* be used