Hints for tootle in main

Warnings

• asv-custom-key-duplicated
  :60 - Purism::form_factor
  A key can only be used once.
• asv-desktop-app-launchable-missing
  -
  This `desktop-application` component is missing a `desktop-id` launchable tag. This means that this application can not be launched and has no association with its desktop-entry file. It also means no icon data or category information from the desktop-entry file will be available, which will result in this application being ignored entirely.
• asv-desktop-entry-value-invalid-chars
  com.github.bleakgrey.tootle.desktop - X-GNOME-UsesNotifications
  The value of this desktop-entry field contains invalid or non-printable UTF-8 characters, which can not be displayed properly.