Fix mobile submit areas padding

jet/static/jet/css/_changeform.scss

@@ -303,6 +303,10 @@ fieldset.monospace textarea {
     margin-bottom: 10px;
   }
 
+  @include for-phone {
+    padding: 0 10px;
+  }
+
   input {
     &, &:visited, &:hover {
       margin: 0 5px 5px 0;

jet/static/jet/css/_changelist.scss

@@ -305,6 +305,10 @@
       margin-bottom: 20px;
     }
 
+    @include for-phone {
+      padding: 0 10px;
+    }
+
     &.initialized {
       display: inline-block;