ECOM-531 Styling the buttons

lms/static/sass/views/_login-register.scss

@@ -174,6 +174,13 @@
         font-size: em(13);
     }
 
+    .action-primary {
+        @extend %m-btn-primary;
+        width: calc( 100% - 20px );
+        margin-left: 10px;
+        text-transform: none;
+    }
+
     @include media( $tablet ) {
         header h1,
         header p,