Previously, we used to have top and bottom paddings of 4px to
the select elements but it was removed in a208da9c4d to make
sure that text for the selected option is aligned properly.
All other select elements have height set to 30px, but the
select elements in stream settings page had height set to
"fit-content" and so they looked ugly after removing the
padding.
This commit sets the height of select elements in stream
settings to 30px.
b119ff68c3