Create precompiled header for NavMesh Editor and restructure project filter

r5dev/naveditor/include/Pch.h

@@ -0,0 +1,43 @@
+
+#define _USE_MATH_DEFINES
+#include <math.h>
+#include <cmath>
+#include <float.h>
+#include <string.h>
+#include <ctype.h>
+
+#include <stdlib.h>
+#include <stdarg.h>
+
+#ifdef WIN32
+#	include <io.h>
+#else
+#	include <dirent.h>
+#	include <cstring>
+#endif
+
+#include <stdio.h>
+#include <cstdio>
+#include <iostream>
+#include <fstream>
+
+#include <set>
+#include <vector>
+#include <algorithm>
+
+#include "thirdparty/sdl/include/SDL.h"
+#include "thirdparty/sdl/include/SDL_syswm.h"
+#include "thirdparty/sdl/include/SDL_opengl.h"
+
+#ifdef __APPLE__
+#	include <OpenGL/glu.h>
+#else
+#	include <GL/glu.h>
+#endif
+
+#ifdef WIN32
+#	define snprintf _snprintf
+#endif
+
+#include "NavEditor/Include/imgui.h"
+#include "NavEditor/Include/imguiRenderGL.h"