Dank Software Depot 0.9.8

Thanks to @BadLemon5267 for catching the first one within a day of it going
out.

• Fixes 0.9.7, which could not be enabled at all on DMS 1.5.x. The window
  was rebuilt on DankFloatingWindow, which is what DMS uses for its own
  windows — and which arrived upstream after 1.5.3. A QML file naming a type
  that does not exist does not fall back to something simpler; it fails to
  load, and takes the widget and the whole plugin with it. The window asks for
  the colour by name again instead of inheriting the component that has it,
  and falls back to the tone that colour is derived from where it is missing.
  The background still matches DMS on a shell that is new enough to have one
  to match.
• One password per update run. A run carrying DMS's own packages asked
  twice, which is why it seemed to come and go: the ordinary packages go
  through a helper under pkexec and the DMS ones through the daemon, because
  that transaction has to outlive the shell reload it causes, and those are
  two different polkit actions. When the shell's packages are in a run, all
  system packages now travel with them in that single daemon transaction.
  Runs without them are unchanged and were never the ones asking twice.
• The up-to-date mark and the DMS penguin follow the theme instead of
  being the only green and the only untinted thing on the dashboard. A failed
  check keeps its red, where the colour is the message.