Remove JavaScript that collapses tabs and replace with an easier
to maintain breakpoint based solution.
Tabs will now collapse below the tablet breakpoint
Note: In the case of mw.util.addPortletLink, to add items to the
`views` menu, these will not be collapsed into the more menu and
must now be explicitly added to both menus, ie. if the window is
resized these will hide and not appear in the more menu.
However, when mw.util.addPortletLink attempts to add to `views` menu
when there is not available space, we will redirect those links to
the more (`cactions`) dropdown menu.
Bug: T306229
Change-Id: I34ace0aeb3e23d8f6a8c5a8680bb492f37e343ad
