i.e. Bragg and things about polarisation https://github.com/easyScience/easyApp/blob/bae8a781cfed7a8d8de130832c554614afbc7f9e/easyApp/Gui/Charts/BaseBokeh.qml#L19
Also all of the tab buttons.
In EasyReflectometry I have had to create a separate BaseBokeh.qml to support Reflectometry specific use cases. I suggest we discuss how to have the content of easyApp more general with specific functionality kept to the specific app repository.