Adding tabs in the edit tabs window.

It would be really nice if it would be possible to add new tabs in the edit tabs window, by pulling a new tab down to the location that you want. So, you have a range of tabs from 1 till 10, but I would like to tab a tab in between, lets say between 4 and 5, to add a main tab like A, B etc. Their should be a function to drag a tab down to that spot in the editor so that we don't have to go through the whole document to find the right page to add a tab. We sometimes have to build files which are over 12k pages and more then 400 tabs