Fix missing await, fix undefined bug

background.html

@@ -654,6 +654,8 @@
                 <div class='error'></div>
             </div>
             <div class='buttons'>
+              <!-- <a class='button grey' id='back-button'>Back</a> -->
+              <!-- <a class='button' id='save-button' data-loading-text='Please wait...'>Save</a> -->
               <button class='button grey' id='back-button' tabindex='2'>Back</button>
               <button class='button' id='save-button' tabindex='1'>Save</button>
             </div>

js/models/conversations.js

@@ -2015,7 +2015,7 @@
         );
         const ourNumber = textsecure.storage.user.getNumber();
         return !stillUnread.some(
-          m => m.propsForMessage.text.indexOf(`@${ourNumber}`) !== -1
+          m => m.propsForMessage.text && m.propsForMessage.text.indexOf(`@${ourNumber}`) !== -1
         );
       })();
 
@@ -2419,7 +2419,7 @@
     },
 
     async deletePublicMessage(message) {
-      const channelAPI = this.getPublicSendData();
+      const channelAPI = await this.getPublicSendData();
       if (!channelAPI) {
         return false;
       }