Fixed: UI Errors in Add Book page

Fixes #1906

frontend/src/Search/AddNewItem.js

@@ -148,11 +148,10 @@ class AddNewItem extends Component {
                       );
                     } else if (item.book) {
                       const book = item.book;
-                      const edition = book.editions.find((x) => x.monitored);
                       return (
                         <AddNewBookSearchResultConnector
                           key={item.id}
-                          isExistingBook={'id' in edition && edition.id !== 0}
+                          isExistingBook={'id' in book && book.id !== 0}
                           isExistingAuthor={'id' in book.author && book.author.id !== 0}
                           {...book}
                         />

frontend/src/Search/Book/AddNewBookSearchResult.js

@@ -138,6 +138,8 @@ class AddNewBookSearchResult extends Component {
                     null
                 }
 
+                {
+                  editions && editions.length > 1 ?
                     <Link
                       className={styles.mbLink}
                       to={`https://goodreads.com/book/show/${editions[0].foreignEditionId}`}
@@ -148,7 +150,8 @@ class AddNewBookSearchResult extends Component {
                         name={icons.EXTERNAL_LINK}
                         size={28}
                       />
-                </Link>
+                    </Link> : null
+                }
               </div>
             </div>
 
@@ -218,7 +221,7 @@ AddNewBookSearchResult.propTypes = {
   overview: PropTypes.string,
   ratings: PropTypes.object.isRequired,
   author: PropTypes.object,
-  editions: PropTypes.arrayOf(PropTypes.object).isRequired,
+  editions: PropTypes.arrayOf(PropTypes.object),
   images: PropTypes.arrayOf(PropTypes.object).isRequired,
   isExistingBook: PropTypes.bool.isRequired,
   isExistingAuthor: PropTypes.bool.isRequired,

frontend/src/Search/Common/AddAuthorOptionsForm.js

@@ -173,7 +173,7 @@ class AddAuthorOptionsForm extends Component {
 AddAuthorOptionsForm.propTypes = {
   rootFolderPath: PropTypes.object,
   monitor: PropTypes.object.isRequired,
-  monitorNewItems: PropTypes.string.isRequired,
+  monitorNewItems: PropTypes.object.isRequired,
   qualityProfileId: PropTypes.object,
   metadataProfileId: PropTypes.object,
   showMetadataProfile: PropTypes.bool.isRequired,