Version bump in preparation for release
Supports Ubuntu 22.04
Beta support for Ubuntu 22.04 ARM64
Added FITS header preview pane to file dialog
Dependent on the latest tigger-lsm (1.7.1)
Fixed float errors with updated library API's
Fixed dockable widgets and window sizing
Refactored plot zooming
Re-enabled splash screen
Fixes venv pip3 bug
Fixes issue #131
Install script 'setup.py install' has been replaced by pip
Updated URL's
GitHub Actions are now compatible with 'act'
Actions now test VENV installations on Ubuntu 20.04 and 22.04
Improved Action tests and logging
