Added inverse, fixing server bug

src/MenuManager.cpp

@@ -3,6 +3,8 @@
 
 namespace ZL {
 
+	extern bool inverseVertical;
+
 	MenuManager::MenuManager(Renderer& iRenderer) :
 		renderer(iRenderer)
 	{
@@ -189,6 +191,14 @@ namespace ZL {
 			if (onShowPlayersPressed) onShowPlayersPressed();
 			});
 
+		//inverseMouseButton
+
+		uiManager.setButtonPressCallback("inverseMouseButton", [this](const std::string&) {
+			inverseVertical = !inverseVertical;
+			std::cout << "Inverse mouse: " << (inverseVertical ? "ON" : "OFF") << std::endl;
+			});
+
+
 
 		/*
 		uiManager.setSliderCallback("velocitySlider", [this](const std::string&, float value) {