flatpak 1.15.91 Enhancements: * Add the `FLATPAK_DATA_DIR` environment variable, which allows overriding at runtime the data directory location that Flatpak uses to search for configuration files such as remotes. This is useful for running tests, and for when installing using Flatpak in a chroot. * Add a `FLATPAK_DOWNLOAD_TMPDIR` variable. This allows using download directories other than /var/tmp. * Emit progress escape sequence. This can be used by terminal emulators to detect and display progress of Flatpak operations on their graphical user interfaces. Bug fixes: * Install missing test data. This should fix "as-installed" tests via `ginsttest-runner`, used for example in Debian's autopkgtest framework. * Unify and improve how the Wayland socket is passed to the sandboxed app. This should fix a regression that is triggered by compositors that both implement the security-context-v1 protocol, and sets the `WAYLAND_DISPLAY` environment variable when launching Flatpak apps. (#5863) * Fix the plural form of a translatable string. Git-EVTag-v0-SHA512: f8416d6a99c2d35464a99c8c223f602d2cc09769f441c9e72a78789c4737176c95042f373f521cdc3fbe4e70b70ca47d2d5cc62b718119f0541d0bfc1b6b96cd