Bug Description

When editing a text element, the originally selected background color is shown, even when using "none" as fill type.

Expected Behaviour

When using "none" as fill type, I don't expect the background color to be shown anywhere anymore.

It should only be brought back when I change the fill type.

Steps to Reproduce

1. Create text element and change text & bg color
2. Set fill type to "none" and leave edit mode
3. Verify that background is transparent again
4. Enter edit mdoe again to see background color reappear.

Screenshots

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Acceptance Criteria

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