In Qt Creator 4.7.0 (and 4.7.0-rc as well) on macOS the text in most of the "toolbars" on top of the editor pane is not vertically centered, the only exception being the line and column numbers (because they are labels and not comboboxes?). Version 4.6 and before do not exhibit the same behavior. Also the text is correctly centered when choosing the Flat Dark theme (but not the Dark theme).

Attached two screenshots demonstrating the difference between version 4.6 and 4.7.