Concerning the Mac look:
The bar with the tab titles is actually limited to about 66 % of the window size. This means that the titles of joined tabs are shortened (in most cases if these joined tabs are not being docked, but remain in the tab pane).
Despite of the hover feature working well: Couldn't this bar be widened (up to 90 % or so)?.
I'm resurrecting this post, and the reason is that I would like a quicker way to see at a glance which pane I should consider with a higher priority when there are several glossaries opened and tabbed vertically (sometimes three glossaries at the same time).
Or, as an alternative, how about displaying a title bar for each pane?
Thanks for considering.