[request] Make sure set_message() actually displays its given message (closes #3003425)
The default automatic form sets a standard submit message as session
data. However in some cases, such as the cancellation of a form edition,
another message is intended to be printed on-screen.
This patch makes sure that set_message() really scrubs all previous
messages (and ids) from the request object and from the session data.
<html>
<head>
<!-- dependencies -->
<script type="text/javascript" src="../../data/jquery.js"></script>
<script src="../../data/cubicweb.python.js" type="text/javascript"></script>
<script src="../../data/cubicweb.js" type="text/javascript"></script>
<script src="../../data/cubicweb.compat.js" type="text/javascript"></script>
<script src="../../data/cubicweb.htmlhelpers.js" type="text/javascript"></script>
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<script type="text/javascript" src="../../../devtools/data/qunit.js"></script>
<link rel="stylesheet" type="text/css" media="all" href="../../../devtools/data/qunit.css" />
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<script src="cwmock.js" type="text/javascript"></script>
<script src="test_htmlhelpers.js" type="text/javascript"></script>
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<body>
<div id="main"> </div>
<h1 id="qunit-header">cubicweb.htmlhelpers.js functions tests</h1>
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<ol id="qunit-tests">
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