0.2.0-beta: Second Beta Release

The second beta release for Flattool GUI. Much has changed under the hood from the first beta, notably:

• Installation and uninstallation of flatpaks are now threaded, meaning GNOME wont display a "not responding" popup
• More keyboard shortcuts
• User data is always trashed instead of sometimes being deleted
• Properties window no longer crashes if there is no app icon
• Properties window no longer crashes if the app's user data has too many symlinks
• The main list shows placeholders for apps with no icon, and this is used for runtimes too
• Manage Leftover Data window size has been changed to allow for toasts better
• Pulsing progress bars are used instead of full page messages (combined with threading)
  This is still a pre-release beta so I cannot promise perfect usability, but fingers crossed.
  If you want wish to install this, then download the .flatpak and make sure you have the gnome nightly flatpak repo