* Added property for expanded padding of expansion panel for solving #24071

* #24071: Renamed default const name for being more descriptive

* #24071: Improved comment of property expandedPadding

* #24071: Improved test by expanding the expansion panel by header tap + precise assertion

* #24071: Renamed property to be more descriptive

* #24071: Adjusted property comment and added missing trailing commas

* #24071: Improved test by checking real exact header size

* #24071: Added test for default header padding

* #24071: Improved comment of expandedHeaderPadding + code style adjustments

* #24071: Added missing trailing comma