Changes

* ''<code>~</code>'' before a comment number writes a link to the comment, same as : ''<code>{url}#c{comment number}</code>''. eg: ''<code>~3</code>'' becomes [https://gramps-project.org/bugs/view.php?id=1#c3]

* A [https://github.com/mantisbt/mantisbt/blob/55fb5721ea7d980557da484390db5c6003b63cd0/config_defaults_inc.php#L1979 limited set] of [https://www.w3schools.com/tags/ HTML tags] can be used in the text field:

<code> &lt;pre&gt; &lt;/pre&gt; &lt;i&gt; &lt;/i&gt; &lt;b&gt; &lt;/b&gt;</code>