[bug 1077423] Overhaul generic feedback form dev

* switches from 3 cards to 2
* switches from happy/sad images in a png sprite to inline SVG
* switches from brick to a simpler card system
* reduces text to the user and makes it more direct so it's clearer
  what's being asked
* makes private/public information clearer
* make the form keyboard-friendlier
[bug 1077423] Update smoke tests for generic feedback form dev
Merge pull request #377 from willkg/1077423-overhaul-generic

1077423 overhaul generic
Fix migration step in deploy to not ask questions
Fix l10n email template
Remove gettext calls for product dashboards

We were working on product dashboards, but I'm pretty sure we're not
going to go further with that. Given that, I'm removing all the gettext
wrappers for those strings so we don't waste l10n time.