Handle Tab Groups when opening a paper in a new tab

[vict0rsch]

The current implementation opens a new tab outside of any group (rightmost position). I would expect to open a paper in the current group. Or at least make it an option in the popup menu.

[julien-blanchon]

I may have misunderstood

https://github.com/julien-blanchon/PaperMemory/tree/178-Handle-Tab-Groups