Combobutton supports the toolbar mold such that it has the same size as other toolbar components

Combobutton functionality is very appealing for usage in a toolbar as a drop-down toolbar button where the accessible sub-commands (contents of the popup menu) could be rendered on the fly. However, the combobutton when placed in a toolbar does not inherit a similar to other toolbar buttons size nor does it support such configuration by the user. This results to an ugly visual effect.