Fix crash on book selector (#431)

* Handle no verses situation

* remove comment lines

* revert code and put in real fix

src/lib/components/BookSelector.svelte

@@ -59,6 +59,7 @@ The navbar component.
                         $nextRef.chapter = 'i';
                         completeNavigation();
                     }
+                    $nextRef.chapter = '1';
                     break;
                 case c:
                     $nextRef.chapter = e.detail.text;