This is a template for inserting plugin tabs in Chunky.
Two types of tabs are demonstrated: main window tabs and render control tabs.
The class CustomMainTab demonstrates building a tab for the main Chunky window. The main window tabs are simple, and are just a JavaFX Tab object.
The class CustomRenderTab demonstrates how to build a tab for the render controls dialog. This type of tab need to be updated when the scene changes, so it implements the RenderControlsTab interface.