Remove resizing of #bigMarkAsRead (#2094)

Remove theme sizing to make scroll as read work per #1980

p/themes/Swage/swage.css

@@ -778,7 +778,6 @@ display: none;
 text-align: center;
 text-decoration: none;
 background: #e3e3e3;
-padding: 20px !IMPORTANT;
 }
 #bigMarkAsRead:hover {
 background: #22303d;

p/themes/Swage/swage.scss

@@ -873,7 +873,6 @@ form {
 	text-align: center;
 	text-decoration: none;
 	background: darken( $color_light, 10%);
-	padding: 20px !IMPORTANT;
 	&:hover {
 		background: $color_aside;
 		color: $color_light;