fix #1784 airplane refresh oncreate

fix #1784
fix #1797
fix #1386

Might want to simplify this routine since you're cleaning things up. It looks like `shouldPrompt` is always passed as `false` so the dialog is unnecessary - all it needs to do is:
```
if (!hasLocalChanges()) {
    popPostDetail();
    mPostList.requestPosts(false);
    mPostList.setRefreshing(true);
}
```