ChatTab: make set text_win in constructor (typing)

poezio/tabs/basetabs.py

@@ -495,9 +495,10 @@ class ChatTab(Tab):
         self.last_stanza_id = None
 
         self._name = jid.full  # type: Optional[str]
-        self.text_win = None
+        self.text_win = windows.TextWin()
         self.directed_presence = None
         self._text_buffer = TextBuffer()
+        self._text_buffer.add_window(self.text_win)
         self.chatstate = None  # can be "active", "composing", "paused", "gone", "inactive"
         # We keep a reference of the event that will set our chatstate to "paused", so that
         # we can delete it or change it if we need to

poezio/tabs/conversationtab.py

@@ -48,8 +48,6 @@ class ConversationTab(OneToOneTab):
         self.nick = None
         self.nick_sent = False
         self.state = 'normal'
-        self.text_win = windows.TextWin()
-        self._text_buffer.add_window(self.text_win)
         self.upper_bar = windows.ConversationStatusMessageWin()
         self.input = windows.MessageInput()
         # keys

poezio/tabs/muctab.py

@@ -91,8 +91,6 @@ class MucTab(ChatTab):
         self.self_ping_event = None
         # UI stuff
         self.topic_win = windows.Topic()
-        self.text_win = windows.TextWin()
-        self._text_buffer.add_window(self.text_win)
         self.v_separator = windows.VerticalSeparator()
         self.user_win = windows.UserList()
         self.info_header = windows.MucInfoWin()

poezio/tabs/privatetab.py

@@ -46,8 +46,6 @@ class PrivateTab(OneToOneTab):
     def __init__(self, core, jid, nick):
         OneToOneTab.__init__(self, core, jid)
         self.own_nick = nick
-        self.text_win = windows.TextWin()
-        self._text_buffer.add_window(self.text_win)
         self.info_header = windows.PrivateInfoWin()
         self.input = windows.MessageInput()
         # keys