New features:
- Fix GitHub Issue #53: Add option to set corner radius
- Fix GitHub Issue #32: Add mechanism to set arrow direction
- Right-click on edge shows a context menu with options to set single arrow, double arrow, hide arrows, and reverse the direction
- Fix GitHub Issue #25: Add a way to delete edges
- Right-click on edge opens context menu with a delete option
Bug fixes:
- Fix GitHub Issue #54: Moving a non-selected node moves selection group
Other:
- Snap: Fix desktop-qt5 not working as a remote part anymore
- Snap: Fix mouse cursor theme