Rename Space/Page without moving original to Trash Bin

If you rename a page, it acutally copies it, and moves the original to the trash bin, where it has to be manually deleted.

If the page is a space with lots of children, and you use "Preserve children" (of course), all of the original pages are moved to the trash bin (in our case thousands)

When renaming a space, display a new Option "Put original into trash bin" (Default Checked). If the user unchecks this, all original spaces/pages are deleted immediately, if the rename transaction was successful