Failure to send message still shows "success"

[thbar]

I just did a test by unplugging my network cable, and trying to send a message.

The popup still said "success" but the console showed an error.

[madrobby]

Also include OS/browser information with reports like these. Browsers are known to (unfortunately) react in different ways to problems like this.

On newer browsers, we should check navigator.onLine (https://developer.mozilla.org/en-US/docs/DOM/window.navigator.onLine)

[thbar]

I'm on Mac OS X 10.7.5 and the test was carried out on Chrome (Version 23.0.1271.95).

On Safari, the behaviour is different: it will apparently remain stuck on "Sending".

A probably related note (should I open a dedicated issue for that probably?): I carried out more tests by running locally a little server that raises an error 500, and success is reported for all the browsers I tried (Chrome 23.0.1271.95, FireFox 16.0.2, Safari 6.0.2)