UI: Support JXR image dropEvent on Windows

UI/window-basic-main-dropfiles.cpp

@@ -17,8 +17,11 @@ using namespace std;
 
 static const char *textExtensions[] = {"txt", "log", nullptr};
 
-static const char *imageExtensions[] = {"bmp",  "tga", "png",  "jpg",
-					"jpeg", "gif", "webp", nullptr};
+static const char *imageExtensions[] = {"bmp", "gif", "jpeg", "jpg",
+#ifdef _WIN32
+					"jxr",
+#endif
+					"png", "tga", "webp", nullptr};
 
 static const char *htmlExtensions[] = {"htm", "html", nullptr};