bugfix: views: Fixed Exit Popup from Stream Members view.

This commit fixes the bug in StreamMembersView that prevented
closing the current and super popup with super().keypress from
within StreamMembersView.

Follow-up bugfix for #856.

Author: zee-bit

zulipterminal/ui_tools/views.py

@@ -1158,7 +1158,7 @@ def __init__(self, controller: Any, stream_id: int) -> None:
         widgets = self.make_table_with_categories(stream_users_content,
                                                   column_width)
 
-        super().__init__(controller, widgets, 'STREAM_MEMBERS', popup_width,
+        super().__init__(controller, widgets, 'STREAM_DESC', popup_width,
                          title)
 
     def keypress(self, size: urwid_Size, key: str) -> str: