allow receiving link previews when sending is disabled

ts/models/message.ts

@@ -626,11 +626,6 @@ export class MessageModel extends Backbone.Model<MessageAttributes> {
   }
 
   public getPropsForPreview() {
-    // Don't generate link previews if user has turned them off
-    if (!window.storage.get('link-preview-setting', false)) {
-      return null;
-    }
-
     const previews = this.get('preview') || [];
 
     return previews.map((preview: any) => {

ts/session/utils/Attachments.ts

@@ -121,7 +121,7 @@ export class AttachmentFsV2Utils {
       // some links does not have an image associated, and it makes the whole message fail to send
       if (!preview.image) {
         window.log.warn('tried to upload file to fsv2 without image.. skipping');
-        return undefined;
+        return preview as any;
       }
       const image = await this.uploadToFsV2({
         attachment: preview.image,