Merge pull request #2000 from metabase/fix-paste-password-on-ios-chrome

Fix pasting passwords on iOS Chrome by hiding the auth scene

resources/frontend_client/app/auth/partials/auth_scene.html

-<section class="brand-scene absolute bottom left right">
+<section class="brand-scene absolute bottom left right hide sm-show">
     <div class="brand-boat-container">
         <svg class="brand-boat" width="27px" height="28px" viewBox="0 0 27 28">
             <g stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">