Align new application Step 1 with design mockups

- remove unneeded variables and markup
- add a cancel button
- add form input descriptions
- add a class selector for the default panel <hr>, and change apperance

styles/elements/_panels.scss

@@ -120,9 +120,9 @@
     @include panel-actions;
   }
 
-  hr {
+  hr, &__break {
     border: 0;
-    border-bottom: 1px dashed $color-gray-light;
+    border-bottom: 1px solid $color-gray-light;
     margin: ($gap * 4) ($site-margins * -4);
   }
 }