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Description
Is your feature request related to a problem? Please describe
Removing elements requires me to click the delete action via the context pad. As a heavy keyboard, I often wish to do that via keyboard, as you know from many other editors (e.g., bpmn-js).
Describe the solution you'd like
Make it possible to remove form fields in the editor via DELETE or BACKSPACE key.
Describe alternatives you've considered
Do not do anything.
Additional context
Inspiration from how it is done in diagram-js editors.