wrap tabs for small devices/windows

[CennoxX]

Currently the tabs are not wrapped, so you have to scroll to the right of the page to see the rest of the tabs:

This is especially bad looking at smartphones (here a screenshot zoomed out, so I could click at the last item):

With this PR the tabs are now wraped at the end of the page, so all tabs stay inside the main page:

[JasonBarnabe]

Awesome, thanks!