Fix #1998, #2439 (reset chat state status)

src/core.py

@@ -3494,6 +3494,10 @@ class Core(object):
             return
         roster.modified()
         contact.error = presence['error']['type'] + ': ' + presence['error']['condition']
+        # reset chat states status on presence error
+        tab = self.get_tab_by_name(jid.full, tabs.ConversationTab)
+        if tab:
+            tab.remote_wants_chatstates = None
 
     def on_got_offline(self, presence):
         """

src/tabs/conversationtab.py

@@ -406,6 +406,7 @@ class DynamicConversationTab(ConversationTab):
         Unlock the tab from a resource. It is now “associated” with the bare
         jid.
         """
+        self.remote_wants_chatstates = None
         if self.locked_resource != None:
             self.locked_resource = None
 

src/tabs/privatetab.py

@@ -357,6 +357,7 @@ class PrivateTab(ChatTab):
 
     def deactivate(self, reason=None):
         self.on = False
+        self.remote_wants_chatstates = None
         if reason:
             self.add_message(txt=reason, typ=2)