HintEditor: propogate preview device type to ContentRenderer

Author: jeremywiebe

packages/perseus-editor/src/hint-editor.tsx

@@ -232,6 +232,7 @@ class CombinedHintEditor extends React.Component<CombinedHintEditorProps> {
                         <ContentRenderer
                             question={this.props.hint}
                             apiOptions={{isMobile}}
+                            screen={this.props.deviceType}
                         />
                     </DeviceFramer>
                 </div>