Fix Hover Logic for Mobile

[ebollens]

We have the following style of code for buttons:

.mwf_notmobile a.button:hover,
a.button:focus,
a.button:active,

We should do the same for other elements (menus and top buttons) because the hover causes buggy behavior on mobile (created by doing a hover and then using the back button).

[zkhalapyan]

On Android devices with PhoneGap distribution, clicking the top button sometimes makes an arbitrary menu item display as if it's hovered.

[ebollens]

This will be added to master when feature/scoped_css is added (see #151).