[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.

/***************************************/
/* Manage view (views/startup.py)      */
/***************************************/

table.startup {
  width: 100%;
}

/* table.startup td { */
/*   padding: 0.1em 0.2em; */
/* } */

table.startup td.addcol {
  text-align: right;
  width: 0.5em;
}

table.startup th{
  text-align: left;
}