[IMP] project_issue: change description field type into html

Because task has an html file and issue was jealous. And also to have
clickable links.

addons/project_issue/models/project_issue.py

@@ -27,7 +27,7 @@ def _get_default_stage_id(self):
     date_deadline = fields.Date(string='Deadline')
     partner_id = fields.Many2one('res.partner', string='Contact', index=True)
     company_id = fields.Many2one('res.company', string='Company', default=lambda self: self.env.user.company_id)
-    description = fields.Text('Private Note')
+    description = fields.Html('Private Note')
     kanban_state = fields.Selection([
         ('normal', 'Grey'),
         ('blocked', 'Red'),