Check if timeline exists and when somebody tries to edit non existing timelime display error message. Add TODO regarding error message customization for Timeline. Add support for calendar widget in timeline for both gsoc and ghop programs (gsoc was hardcoded before).
Patch by: Pawel Solyga
Review by: to-be-reviewed
{% comment %}
Licensed under the Apache License, Version 2.0 (the "License");
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You may obtain a copy of the License at
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{% endcomment %}
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
<html lang="en">
<head>
<title>500 Server Error</title>
</head>
<body><h1>500 Server Error</h1></body>
</html>