Revert some changes from #3389 that are not relevant for world units

Source/Engine/Core/Math/Viewport.cs

@@ -173,12 +173,12 @@ namespace FlaxEngine
         /// <returns><c>true</c> if the specified <see cref="Viewport"/> is equal to this instance; otherwise, <c>false</c>.</returns>
         public bool Equals(ref Viewport other)
         {
-            return X == other.X &&
-                   Y == other.Y &&
-                   Width == other.Width &&
-                   Height == other.Height &&
-                   MinDepth == other.MinDepth &&
-                   MaxDepth == other.MaxDepth;
+            return Mathf.NearEqual(X, other.X) &&
+                   Mathf.NearEqual(Y, other.Y) &&
+                   Mathf.NearEqual(Width, other.Width) &&
+                   Mathf.NearEqual(Height, other.Height) &&
+                   Mathf.NearEqual(MinDepth, other.MinDepth) &&
+                   Mathf.NearEqual(MaxDepth, other.MaxDepth);
         }
 
         /// <summary>