Demo crashes when toggling between Windowed and Borderless modes

[Stehfyn]

Looks like i broke the ability to toggle between modes when adding the render callback to the WndProc.

The culprit was implicitly modifying the window style within the WndProc

imgui-borderless-win32/imgui-borderless-win32/main.cpp

Lines 205 to 208 in 8506b7b

	static SmartProperty<INT> window_mode{ 1 };
	ImGui::RadioButton("Windowed", &window_mode.m_Value, 0);
	ImGui::RadioButton("Borderless", &window_mode.m_Value, 1);
	if (window_mode.update()) window.set_borderless(window_mode.m_Value);

[Stehfyn]

And we back