we were checking for @ unless we had /echo but it is also valid to contact...

we were checking for @ unless we had /echo but it is also valid to contact jabber.org so it is time we do not check at all if jid has @

src/dialogs.py

@@ -727,12 +727,6 @@ class NewMessageDialog:
 		_('Please make sure you are connected with "%s".' % self.account)
 			).get_response()
 			return
-	
-		if jid.find('@') == -1 and not jid.endswith('/echo'):
-			# if no @ was given and jid is not server.tld/echo
-			ErrorDialog(_('Invalid contact ID'),
-	_('Contact ID must be of the form "username@servername".')).get_response()
-			return
 
 		gajim.interface.roster.new_chat_from_jid(self.account, jid)
 
@@ -1072,12 +1066,6 @@ class SingleMessageWindow:
 				message)
 			return
 
-		if to_whom_jid.find('@') == -1 and not to_whom_jid.endswith('/echo'):
-			# if no @ was given and jid is not server.tld/echo
-			ErrorDialog(_('Invalid contact ID'),
-		_('Contact ID must be of the form "username@servername".')).get_response()
-			return
-
 		# FIXME: allow GPG message some day
 		gajim.connections[self.account].send_message(to_whom_jid, message,
 			keyID = None, type = 'normal', subject=subject)