iOS theme: Permanant background to attachment part of bubble

(this is to handle a quote making bubble wider, but a narrow image)

ts/components/conversation/Quote.md

@@ -814,6 +814,44 @@ const View = Whisper.MessageView;
 </util.ConversationContext>
 ```
 
+#### Quote, portrait image attachment
+
+```jsx
+const outgoing = new Whisper.Message({
+  type: 'outgoing',
+  sent_at: Date.now() - 18000000,
+  quote: {
+    text: 'How many ferrets do you have?',
+    author: '+12025550011',
+    id: Date.now() - 1000,
+  },
+  attachments: [{
+    data: util.portraitYellow,
+    fileName: 'pi.gif',
+    contentType: 'image/gif',
+  }],
+});
+const incoming = new Whisper.Message(Object.assign({}, outgoing.attributes, {
+  source: '+12025550011',
+  type: 'incoming',
+  quote: Object.assign({}, outgoing.attributes.quote, {
+    author: '+12025550005',
+  }),
+}));
+const View = Whisper.MessageView;
+<util.ConversationContext theme={util.theme}>
+  <util.BackboneWrapper
+    View={View}
+    options={{ model: incoming }}
+  />
+  <util.BackboneWrapper
+    View={View}
+    options={{ model: outgoing }}
+  />
+</util.ConversationContext>
+```
+
+
 #### Quote, video attachment
 
 ```jsx