wxGUI/vdigit: fix close frame if Vector Digitizer is run as standalone app g.gui.vdigit #2456
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Describe the bug
The standalone Vector Digitizer app window doesn't close after you hit "power off" toolbar.
To Reproduce
Steps to reproduce the behavior:
g.gui.vdigit map=geology
Expected behavior
Standalone Vector Digitizer app window should be closed after you hit "power off" toolbar.
System description (please complete the following information):