don't show the "edit" or "save" buttons when the user does not have the...

don't show the "edit" or "save" buttons when the user does not have the permissions to save the card anyways.

resources/frontend_client/app/query_builder/header.react.js

@@ -147,7 +147,7 @@ export default React.createClass({
         var title = this.props.card.name || "What would you like to know?";
 
         var editButton;
-        if (!this.cardIsNew()) {
+        if (!this.cardIsNew() && this.props.card.is_creator) {
             editButton = (
                 <Saver
                     card={this.props.card}
@@ -172,7 +172,7 @@ export default React.createClass({
                     canDelete={false}
                 />
             );
-        } else if (this.cardIsDirty() || this.state.recentlySaved) {
+        } else if ((this.cardIsDirty() || this.state.recentlySaved) && this.props.card.is_creator) {
             // for existing cards we render a very simply ActionButton
             saveButton = (
                 <ActionButton