Fix crash when saving any module settings while module being disabled (#1259)

src/modules/fancyzones/lib/Settings.cpp

@@ -15,6 +15,7 @@ public:
     }
     
     IFACEMETHODIMP_(void) SetCallback(IFancyZonesCallback* callback) { m_callback = callback; }
+    IFACEMETHODIMP_(void) ResetCallback() { m_callback = nullptr; }
     IFACEMETHODIMP_(bool) GetConfig(_Out_ PWSTR buffer, _Out_ int *buffer_sizeg) noexcept;
     IFACEMETHODIMP_(void) SetConfig(PCWSTR config) noexcept;
     IFACEMETHODIMP_(void) CallCustomAction(PCWSTR action) noexcept;