#1611 Camera control fixes and improvements

[AlexandruPopovici]

Description & motivation

Adressed issue #1611

Changes:

• When selecting a canonical view, the camera target is always reset relative to the scene's extents Canonical Views don't reset target #1590
• loadObject and loadObjectAsync now have an extra optional zoomToObject parameter which tells the camera to focus on the loaded object or not. Defaults to true
• Selecting custom views will automatically re-enable camera rotations, if previously disabled by orthographic canonical views
• Improved, camera behavior when switching from perspective to orthographic and back. There is still an issue with not matching orthographic size (zoom) with perspective distance when switching back and forth.

To-do before merge:

Screenshots:

Validation of changes:

Checklist:

• My pull request follows the guidelines in the Contributing guide?
• My pull request does not duplicate any other open Pull Requests for the same update/change?
• My commits are related to the pull request and do not amend unrelated code or documentation.
• My code follows a similar style to existing code.
• I have added appropriate tests.
• I have updated or added relevant documentation.

References