Verification: revising textarea reset formatting and increasing close modal control size

lms/static/sass/views/_verification.scss

@@ -218,10 +218,15 @@
 
 
   // reset: forms
-  input {
+  input,textarea {
     font-style: normal;
     font-weight: 400;
     margin-right: ($baseline/5);
+    padding: ($baseline/4) ($baseline/2);
+  }
+
+  textarea {
+    padding: ($baseline/2);
   }
 
   label {
@@ -1629,6 +1634,7 @@
       }
 
       .close-modal {
+        @include font-size(24);
         color: $m-blue-d3;
 
         &:hover {