fixes #4400

This also changes the behavior of the bin command to find cli.js relatively,
meaning the CLI now supports non-standard install locations.

fixes #4471

Make mouse cursor visible in dark themes. Fixes #754

This reverts commit 9a15f9e3.

fixes #4861

fixes #4861

Use gallery service directly from Code

/usr/bin/<app> now symlinks to the launcher. This makes the CLI
accessible in the zip archive version.

Fixes #4426

Prevents a random build issue where the file permissions would change sometimes
which makes the deb package fail lintian.

#4792