Not that I know of but very possible with a plugin
You're right, I know there's an openInCurrentTab, however, I will lose my undo history because it's actually a new view...
Also, I can't get it to work.
This is what I'm trying without success in the console:
(if I use the 'open' command instead, it opens the file correctly, in a new tab of course.)
It prompts me for a filename. Can anyone point me in the right direction?
Anyhow, plugin aside, I just thought it would be useful to be able to rename from the tab and keep the undo history.