Give folder list and link batch list more space on mobile; correct "n…

…o folder" notification spacing.

perma_web/static/css/style-responsive.scss

@@ -3946,11 +3946,7 @@ footer {
 
 .col-folders, #folder-tree {
  @media (max-width: $width-desktop) {
- margin-bottom: $double;
- // override IE-10 compatible JS on mobile
- // to improve experience for users w/ few folders
- height: 30vh !important;
- padding-bottom: 5ex !important;
+ height: 50vh;
  }
 }
 
@@ -4059,12 +4055,9 @@ footer {
  text-align: center;
  font-weight: 200;
  font-size: 24px;
- margin-top: $double;
+ margin: $grid * 4 0 $grid * 7;
  font-family: $font-hed-alt;
  color: $color-blue;
- @include respond-tablet {
- margin-top: $grid * 6;
- }
 }
 
 .item-container._isExpandable {