make upload warning message dynamic

app/components/BookBuilder/Chapter/UploadButton.jsx

@@ -75,13 +75,15 @@ export class UploadButton extends React.Component {
     if (!this.isLocked()) return null
 
     const { showModal } = this.state
-    const { modalContainer } = this.props
+    const { chapter, modalContainer } = this.props
+    const type = chapter.subCategory
 
     return (
       <UploadWarningModal
         container={modalContainer}
         show={showModal}
         toggle={this.toggleModal}
+        type={type}
       />
     )
   }

app/components/BookBuilder/Chapter/UploadWarningModal.jsx

@@ -4,9 +4,11 @@ import AbstractModal from '../../common/AbstractModal'
 
 class UploadWarningModal extends React.Component {
   renderBody () {
+    const { type } = this.props
+
     return (
       <div>
-        You are not allowed to import contents while a chapter is being edited.
+        You are not allowed to import contents while a { type } is being edited.
       </div>
     )
   }
@@ -31,7 +33,8 @@ class UploadWarningModal extends React.Component {
 UploadWarningModal.propTypes = {
   container: React.PropTypes.object.isRequired,
   show: React.PropTypes.bool.isRequired,
-  toggle: React.PropTypes.func.isRequired
+  toggle: React.PropTypes.func.isRequired,
+  type: React.PropTypes.string.isRequired
 }
 
 export default UploadWarningModal