Move action bar below the charts on small screens

The action bar is currently vertically aligned with the title. For this reason, it is rendered above the charts on smaller screens:


It might make sense to place the action bar below the charts along with the info boxes. First, because it’s not the topmost important piece of information (especially on small screens, where space is limited). Second, vertically aligning the action bar with the title will look odd when adding a view switcher as suggested in #115.