The new property "enabled" allows to define a lambda to dynamically enable/disable parameters.
Disabled parameters are not used in the uid, not exported to the command line and not visible in the interface.
Usage of DelegateModel for model filtering has not proven to be the most stable solution, and might be responsible for random crashes happening during engine's garbage collection. Implement Loader-based alternative:
* first delegate is a Loader which creates the AttributeItemDelegate if necessary
* compensate spacing using negative height when element is hidden
* allow to solo a 3D media from the GraphEditor by double clicking on a node or an attribute with the Control modifier pressed
* consistent with Viewer3D.MediaLibrary behavior (solo on Ctrl+Click on visibility button)
* handle supported file extensions in Viewer3DSettings
* NodeEditor
* exposes Node parameters: compatibility, attributes and logs
* provides a placeholder when no active Node
* AttributeEditor
* only displays the list of Attributes
* use 'AttributeEditor' for GroupAttributes in AttributeItemDelegate
* Layout
* move NodeEditor on the same SplitView level as GraphEditor
* move current node name and menu to the Panel's header
* bugfix: in latest PySide2 versions, application palette is not properly applied to all QtQuick Controls 2 components. Force this by exposing QApplication palette and bind it to the root ApplicationWindow.
* rename all "palette" ids to "activePalette" to avoid clashes with "palette" property on QtQuick Controls 2
* use parent component palette when it makes sense to propagate active/disabled style (instead of always using Active SystemPalette)
* avoid duplication of code for displaying labels of GroupAttribute's children
* display input/output aligned to the left/right
* add a background to improve readability
* give access to Node's chunks log files (log, statistics, status) with auto-reload when current NodeChunk is being computed
* add tabs system in the AttributeEditor to switch between attributes edition and Node log
