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Esc key press doesn't close vsgviewer on Windows

2

**Describe the bug** Open vsgviewer, press Esc, window doesn't close. On Fedora vsgviewer is closed when Esc is pressed and seems that CloseHandler is responsible for this. **To Reproduce** Steps...

Probably incorrect handling of left/right ALT key on Windows

1

**Describe the bug** I've noticed that on Windows I don't receive vsg::KEY_Alt_L and vsg::KEY_Alt_R for vsg::KeyPressEvent and vsg::KeyReleaseEvent. I've checked Win32_Window.cpp and there is VirtualKeyToKeySymbolMap _vk2vsg which is used for...