On this wiki I'm on, most navboxes use tables. The header will be centered and there will be the expand/collapse button thing on the right to view the rest of the table. The issue is, the expand/collapse text sets the right bound of where the header centers itself, pushing it to the left. It also means that the header moves a little to the left depending on whether it says collapse or expand, because the two words are different lengths.
I would like this gone, and for the expand/collapse text to be ignored when the header is being centered, if possible.
This graphic demonstrates both the difference when expanded/collapsed, and that both skew the header right of the red line, which represents the true center.
I am able to access the wiki's css, if that helps.