fix: sd-combobox mobile visual issues #5880

Job	Run time
Verify (packages/theming)	51s
Verify (packages/eslint-plugin)	53s
Verify (packages/tokens)	55s
Verify (packages/placeholders)	55s
Verify (packages/styles)	51s
Verify (packages/components)	2m 31s
Verify (packages/docs)	8m 27s
Verify Chromatic	1m 52s
	17m 15s

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