Adding tab(s) to an existing session

[GHNewbiee]

Is your feature request related to a problem? Please describe.
I would like to add a new tab to an existing session. For the time being, the only option I have is to use the "add current window" menu option, getting a session with an additional window.

Describe the solution you'd like
An additional option would be added, like "add current tab", under "add current window".

Additional context
The only drawback I see is in case that more than one windows exist in a session. In that case, the question is in which window the tab will be added.

[sienori]

I implemented the ability to add current tab in version 6.9.0! #458
Right-click on the window title or click on the Edit button to display the menu.