Overrode setTextBuffer method so that it tells controller when the po…

…pup's text buffer has changed.

app/window.py

@@ -1129,7 +1129,6 @@ def __init__(self, host):
     self.host = host
     self.controller = app.cu_editor.PopupController(self)
     self.setTextBuffer(app.text_buffer.TextBuffer())
-    self.controller.setTextBuffer(self.textBuffer)
     self.longestLineLength = 0
     self.message = []
     self.showOptions = True
@@ -1170,6 +1169,10 @@ def setMessage(self, message):
     self.message = message.split("\n")
     self.longestLineLength = max([len(line) for line in self.message])
 
+  def setTextBuffer(self, textBuffer):
+    Window.setTextBuffer(self, textBuffer)
+    self.controller.setTextBuffer(textBuffer)
+
   def unfocus(self):
     self.hide()
     Window.unfocus(self)