Release 5.0.4

• error popups with tree of errors, now default to expanding current file
• row detection for drag/drop + contect menu replaced with pick/ bounds and row counting (far more reliable)
• css moved to resource
• editor resize font now centralized and synced on all windows
• added back roopacker dependancy (uses threaded compile)
• reference to wishlist on readme
• support for structs when adding objects (eg. CClosureExpression)
• editor font size uses ctrl-scroll to enlarges / shrink
• fixed issue with missing references on node creation
• completion now uses editor context to decide if to try and complete
• target names in gtk settings only support a-z
• file dialogs can be closed with esc key
• added library support for meson creation, including version and licence in settings