Currently in order to republish CA certificates it is necessary to go into the page for editing CAs, and click on the button there.
There is no reason why this button should belong on the "Edit CA" page, and it might be better to move it somewhere else, for example into the "CA Structure & CRLs" page.
The logic behind this move (at least out of the "Edit CA" page) is that the editing of CAs can be a somewhat dangerous (or even destructive) operation, while republishing the CA certificates (and CRLs, btw, what this button does) is a benign operation with no dangerous consequences.
Another reason is the button should be more accessible/easier to reach.
This way the user does not have to worry if something got modified on the "Edit CA" page by mistake.
It might be useful to also have a "Republish all CA certificates" button somewhere.