Fixed privilege escalation code attempting to run when interacting with user-only menus

Former-commit-id: bcc2a99ab5324a049982bfff83eb191cfd7c0346
Former-commit-id: ce58e4b07a2e5fc26ab34c8ecdc695953b5a2d58

lib/stweak.py

@@ -512,7 +512,7 @@ def global_menu(_scr, _device_type, _top_message):
             _exit_signal = True
         if _exit_signal:
             break
-    return False, False, False
+    return None, None, None
 
 
 # runs initial configuration wizard
@@ -582,6 +582,8 @@ def wrapped_entry(_gm_device_type, _gm_top_message='configuration options:'):
         _ext_name, _escalator, _action = \
             wrapper(lambda _wrap_stdscr: (use_default_colors(),
                                           global_menu(_wrap_stdscr, _gm_device_type, _gm_top_message)))[1]
+        # only run if privilege escalation is needed
+        if _action is not None:
             if _action:
                 # install with privilege escalation (outside of curses)
                 from tempfile import gettempdir