Cleanup.

3rdparty/ocornut-imgui/widgets/gizmo.h

@@ -1,3 +1,5 @@
+// https://github.com/CedricGuillemet/ImGuizmo
+
 namespace ImGuizmo
 {
 	// call BeginFrame right after ImGui_XXXX_NewFrame();

3rdparty/ocornut-imgui/widgets/gizmo.inl

@@ -1,3 +1,5 @@
+// https://github.com/CedricGuillemet/ImGuizmo
+
 namespace ImGuizmo
 {
 	const float ZPI = 3.14159265358979323846f;