fix font size in ComboBox/TabControl #299

Job	Run time
Check the access tokens used for publishing	1s
Generate Version-Specific Network Keys	48s
Build for MacOS	1m 59s
Build for Windows	8m 34s
Build for Linux	2m 30s
Publish to Forum	0s
Debug Build Artifacts	0s
Publish GitHub Release	0s
	13m 52s

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