Fix AltGr handling on windows

It appears as mod=6, ctrl+alt codes shouldn't send the escape codes either.

src/main/java/org/lwjglx/opengl/Display.java

@@ -168,7 +168,7 @@ public void invoke(long window, int key, int scancode, int action, int mods) {
                 cancelNextChar = false;
                 if (key > GLFW_KEY_SPACE && key <= GLFW_KEY_GRAVE_ACCENT) { // Handle keys have a char. Exclude space to
                                                                             // avoid extra input when switching IME
-                    if ((GLFW_MOD_CONTROL & mods) != 0) { // Handle ctrl + x/c/v.
+                    if ((GLFW_MOD_CONTROL & mods) != 0 && (GLFW_MOD_ALT & mods) == 0) { // Handle ctrl + x/c/v.
                         Keyboard.addGlfwKeyEvent(window, key, scancode, action, mods, (char) (key & 0x1f));
                         cancelNextChar = true; // Cancel char event from ctrl key since its already handled here
                     } else if (action > 0) { // Delay press and repeat key event to actual char input. There is ALWAYS a