close #218

There was two problems.
the original problem came from the width calculation of "p.message"
elements. In the timeline, first elements have width > 0, after
switching to conversation view their width to pass to 0;
The switching view needs add a timeout before add open street's map's
image.
Close #189

Use NSResourceLoadDelegate to disable the cookie management to avoid
see the timeline via profile view
Thanks to https://github.com/poweruser82
Merge pull request #230 from dblugeon/fixe-issue-189

Fixe issue 189