Tabs sidebar does not include other existing sidebar

[turekg]

What happened?

When I enabled the tabs sidebar an additional sidebar was created rather than opening in the already existing sidebar which already allows me to switch (in my particular case) between Sage-like, Tab Stash, In my Pocket in addition to History, Bookmarks and Synced tabs

Reproducible?

• [X] I have checked that this issue cannot be reproduced on Mozilla Firefox.

Version

G6

What platform are you seeing the problem on?

Linux, macOS

Relevant log output

No response