v4.0.0

• Added possibility to set colors of classes and associations
• Classifiers can now be placed into packages
• Fixed multiline class names
• Prevent attributes with empty names (which made them unclickable)
• Generalization self-loop no longer allowed
• Added option to switch association ends
• Added more information to the included README
• Added ability to create line waypoints
• Replaced snapping to grid with snapping to existing elements
• Inner elements now move when the owner is moved
• Reworked element resizing
• Improved image exporting; added PDF export
• Added Note and Boundary elements
• Palette can now be switched between left and right in settings
• Operation Show no longer puts all the elements on the same spot
• Added delete key shortcut
• Partial support for multiple models in project and multiple diagrams per model
• Added mac-ARM build (alpha)
• Improved Linux distro compatibility
• Improved save file dialog
• Fixed version information dialog
• Updated multiple dependencies
• Other minor fixes and improvements