managing of mail filters fails

[smidhonza]

In mail filter section there is problem with saving a new filter actions. If you are fast adding/clicking new rows it is serious problem because function rcube_timer() returns microtime as an ID of forms elements, which could be not unique number.

It works fine with this patch in /program/include/main.inc

function rcube_timer()
{
	return substr(mt_rand(), 0, 10);
}

Instead of

function rcube_timer()
{
  return microtime(true);
}

[alec]

Fixed in r5710/svn.