Better integration of PHPMailer

Now, tmail/from would be used over tmail/phpmailer/from. Last would be used only if tmail/from contains no value. This way you can properly specify sender using default TMail functionality

e.g. $tmail->send($to, $from);

if $from is ommited, TMail grabs tmail/from from config. So, if you leave that empty, then tmail/phpmailer/from is used
Merge branch 'master' of https://github.com/atk4/atk4-addons