* Performance optimizations in the InferenceBlock

* The Inference block now has an out-port that bundles all results

* Canvas block: Added an out-port for colorized image tags bitmaps

* Black image tags are now handled correctly in the tags bitmap generation
* Some fixes

* Image tags can now be generated automatically from the colors of a layer
* Added an option to the CanvasBlock to make automatically created layers renderable by default
* Checklist items can now be randomly checked
* Some other small helpful improvements

* Added a properties dialog for layers

* Reordered ports in the training/inference blocks

* The Z-Order of items wasn't updated after deleting a layer

* Added an InferenceBlock (WIP)

* Pipeline executions can now be canceled

* Tags port moved from ML method to learning block

* New draft items will now be assigned tags matching their primary color on creation

* Lots of changes in the file hierarchy

* Added a helper class to store image reference selections

* Tags are now intelligently assigned when generating the tags bitmap based on colors and layer tags

* The output block now has an out port for the (merged) tags bitmap