- update to 2.10:
* Upgrade icons (use SVG)
* Add "Commit" column to history view to show the short commit hash.
* build: sync qmake config to latest changes for cmake config
* Bump minimum Qt version to 5.14
* Support --help, --help-all and --version in command line
* Fix build on MacOS
* Add option to open external diff tool on double click
* Add branch name to window title
* Fix loading of invalid cache file
* Settings: Option to display short hash instead of full length hash
* Save and restore the list view column sizes
* Make drag & drop functionality optional
* Make Settings dialog accessible on macOS
* Improve logic to detect failed external commands under Unix-like OSes
* Don't rely on STDERR for determining whether command failed
* Compilation cleanup
* Support for fractional device pixel ratio
* Update project URLs to GitHub repo