Adds display of the current and minimum layer heights (in mm) to the Simulation View slider labels. Implements new properties and logic in SimulationView and SimulationViewProxy to retrieve accurate layer heights for both sliced and gcode data. Bumps plugin version to 1.1.0.
Introduces warning icons in the SimulationView menu to indicate when extruder visibility is low or unchecked. Updates layout logic to accommodate the new icons and increments the plugin version to 1.0.2.
We want to keep it this way so people can still make plugins work for older versions of Cura, like 3.6, where the 'api' field with just a single major version, instead of the 'supported_sdk_versions', which can be either a version-string like '7.6.0' or a list of version strings.
The Cura 4.9 release will have expanded functionality. If you have a plug-in that uses this functionality, marking it as using SDK 7.5.0 will notify older Cura releases that they can't use that plug-in.
