* Inspector
* changed "SETTINGS" to "DISPLAY"
* new "CAMERA" section: activate camera synchronization + control image overlay
* ImageOverlay: new component to display (undistorted) image on top of the 3D view
* ViewpointCamera: new component that sets up a Camera based on a Viewpoint internal parameter
* Viewer3D: additional ViewpointCamera to perform synchronization with image selection
* Viewer3DSettings: new properties related to camera synchronization mode
Since Qt-5.13, RenderSettings.OnDemand can lead to rendering issues due to non-triggered updates (e.g: when resizing the viewport or changing visibilities of objects displayed).
* 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
* centralize initial camera parameters + move camera closer to the scene center
* add motion smoothing when camera position is set
* improve grid material aspect
* Define 2 groups: "Settings" and "Scene"
* Settings
* add camera scale slider control
* move rendering modes back to an independent overlay outside the inspector
* Scene
* add button to control visibility of media info
* ease bidirectional navigation between 3D media list and graph
* use same mechanism to indicate selected/hovered elements
* remove 'frame' button (space gain + action available on double click)
* enable PrimitivePicking to enable picking on point clouds
* use OnDemand render policy
* activate FrustrumCulling + increase far plane
* add management of rasterized OpenGL points via a PointSize render
Keyboard Actions are never deactivated when focus is lost, leading to picking being enabled on a single click when Control was pressed in the 3D viewer and focus was lost to another Item.
* keep track of focus loss inside the DefaultCameraController
* use it to disable picking while Keyboard has not been pressed back in the 3D viewer
* do the same for 'moving' state with Alt modifier
