Remove some extra model refiltering.

Whenever we write to the underlying child_model gtk will call the _visible_func on itself.

src/gajim.py

@@ -910,7 +910,6 @@ class Interface:
 			# It must be an agent
 			if ji in jid_list:
 				# Update existing iter
-				self.roster.modelfilter.refilter()
 				self.roster.draw_contact(ji, account)
 				self.roster.draw_group(_('Transports'), account)
 				if new_show > 1 and ji in gajim.transport_avatar[account]:

src/roster_window.py

@@ -829,8 +829,6 @@ class RosterWindow:
 		if jid in gajim.newly_added[account]:
 			gajim.newly_added[account].remove(jid)
 			self.draw_contact(jid, account)
-			# redraw group visibility
-			self.refilter_shown_roster_items()
 
 	# FIXME: maybe move to gajim.py
 	def remove_to_be_removed(self, jid, account):
@@ -842,7 +840,6 @@ class RosterWindow:
 		if jid in gajim.to_be_removed[account]:
 			gajim.to_be_removed[account].remove(jid)
 			self.draw_contact(jid, account)
-		self.refilter_shown_roster_items()
 	
 	#FIXME: integrate into add_contact()
 	def add_to_not_in_the_roster(self, account, jid, nick = '', resource = ''):