Default connection between blocks is not visually correct

[sunilshetye]

This is an mxgraph issue.

When clicking between ports, the connection is not visually correct.

e.g.

Here, there are two issues:

1. The connection goes through the block in the middle.
2. The connection takes a left turn very close to the block on the right.

The connection should look more like this:

[sunilshetye]

@TheThinker277 please check