This issue manifested in a crash in rare circumstances when the Editor lost and gained focus while a modal dialog was active. After investigation, it was discovered that native event processing can lead to IdleProcessing being called again from the main thread while idle processing is still happening. As this is unintentional and generally undesirable, we now guard against this within the IdleProcessing method.
* Fix some FOV calculation viewport issues:
-Avoid calculating FOV if we've got an invalid viewport
-Don't override game mode FOV, let the active camera components manage it instead
* Fix viewport font positioning
This updates code in a few places to respect an API change/fix made to AtomFont - also switched the default value of m_virtual800x600ScreenSize to false as it's really behavior you want to opt into
* Don't activate CameraComponentController when in the Editor / not in game mode
* wip support for mesh intersection with intersector bus
* WIP camera mesh intersection orbit logic
* remove unneeded template argument
* add bus connect/disconnect
* fix intersection logic
* small updates, additional comments, some tidy-up
* update formatting options slightly
* use aznumeric_cast
* temp workaround for negative distances with RayIntersection
* Clarify ViewportWorldToScreen being in widget space and add DeviceScalingFactor
* -Fix viewport icons being draw wrong on high DPI displays
-Fix loading viewport icons from absolute paths, which
* Address review feedback, fix build
* add better support for mouse deltas with camera system
* small fixes spotted during review
* rename after review feedback
* small refactor to reduce duplication
* update camera controller to block box select during orbit
* simplify update for modern viewport camera controller
* wip working lmb box select with orbit
* add test for changes to click detector
* add unit test for camera system to validate events
* remove debugging code, tidy-up changes for PR
* small updates before posting PR
* fix for linux build failure
-This ensures OnBootstrapSceneReady still fires even if the bootstrap system component doesn't create a default scene
-This also disables default scene creation for non-game projects by default to ease tools development
Tested with the Editor, AtomSampleViewer, the Material Editor, and the AtomTest launcher