Deckback v0.0.8

Fixed

• Updating from inside the app works again. On 0.0.7 the update would appear, "Update now"
  would say it had worked, and the next launch would still be on the old version — with the app
  then reporting no updates. 0.0.7 asked for one extra system permission, and Flatpak refuses to
  install an update that wants more access than the version you already have. That permission is
  gone, so 0.0.6 and 0.0.7 can both update to this release normally.
• Deckback no longer claims an update succeeded before it has. The confirmation appeared the
  instant you pressed the button, whatever happened afterwards. It now waits for the real answer
  and tells you which one it got: installed, already up to date, or failed and why. If an update
  ever is refused for needing new permissions, Deckback now says so and gives you the one command
  that fixes it.
• "No update is currently available" is gone. Deckback never checked at startup — it waits for
  the system to announce one, which happens about every half hour — so that line was a guess
  presented as a fact, and read as "your update already installed". It now says what it actually
  knows.

Added

• Check for updates. A button in Settings ▸ Updates that asks right now instead of waiting
  for the next automatic check, and tells you if you are already on the latest version.
• The changelog is readable. Release notes were cut off after a few lines with no way to scroll
  them. In the Updates tab, ↑/↓ now scroll the notes and ←/→ move between the buttons; the
  hint bar at the bottom says so. Deckback also shows what changed in the version you are running,
  not only in one you have not installed yet.