[Signature help] Closing Sublime Text when a signature help is present will not completely shut down Sublime Text

[hoanhtien]

Repro steps:

1. Trigger a signature help popup:
   
2. Close Sublime Text, the popup remains on the screen:
   
3. Open Sublime Text again, previous tabs are not automatically loaded. This is because Sublime Text did not shut down completely.
   

[hoanhtien]

I try adding an event handler to close the popup during on_pre_close event but no luck.

Code:

typescript/listerners/popup_manager.py
    ...
    def on_close_popup(self):
        """ Call whenever the view loses focus, of the region is exited """
        log.warn("popup_manager.py: on_close_popup")
        if self.current_view:
            self.current_view.erase_regions('argSpan')
            self.current_view.hide_popup()
            self.current_view = None
            log.warn("popup_manager.py: popup should have closed by now")
        self.signature_help = None
    ...

typescript/listerners/tooltip.py        
    ...
    def on_pre_close(self, view):
        log.warn("tooltip.py: on_pre_close")
        popup_manager = get_popup_manager()
        popup_manager.on_close_popup()
  ...
  EventHub.subscribe("on_pre_close", listen.on_pre_close)

typescript/listeners/listeners.py
    ...     
    def on_pre_close(self, view):
        log.warn("on_pre_close")
        EventHub.run_listeners("on_pre_close", view)
    ...

Log file:

2015-08-31 18:22:11,610: 8380: INFO: Logging configured to log to file: C:\Users\tihoanh\AppData\Roaming\Sublime Text 3\Packages\TypeScript-Sublime-Plugin\typescript\TS.log
2015-08-31 18:22:11,641: 8380: WARNING: TypeScript plugin initialized.
2015-08-31 18:22:17,251: 8380: WARNING: on_pre_close
2015-08-31 18:22:17,251: 8380: WARNING: tooltip.py: on_pre_close
2015-08-31 18:22:17,251: 8380: WARNING: popup_manager.py: on_close_popup
2015-08-31 18:22:17,251: 8380: WARNING: popup_manager.py: popup should have closed by now