Small updates from Holly as mentioned on Bug 868199

Updates:

1. SUMO link and second sentence for 'not up-to-date' desktop user is not in banner: http://cl.ly/image/1x3f0G0N1f0k.
See c#6 https://bugzilla.mozilla.org/show_bug.cgi?id=883800#c6


2. For all mobile views, can we allow download buttons and links (at least top link) to show in the viewport? Suggestion would be to reduce vertical spacing between elements on the page and/or minimize banner font size so that all fit in viewport.
 
button initially out of view: http://cl.ly/image/2z1i0y2g0O2q
button in view after scrolling past tabzilla: http://cl.ly/image/3U043Z0O0z3c


3. For all mobile views, left align links that take over the download button area. They are showing up center aligned: http://cl.ly/image/0W1f3l0R2n1c