Change design of i/o ports

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#2 opened on Sep 13, 2018 4 comments 0 reactions 1 assignee Claimed by @Sabrina1231 View on GitHub

enhancement good first issue

Description

![image](https://user-images.githubusercontent.com/263321/45475834-c1604500-b73d-11e8-8c83-03e5f2c5f1f6.png)

Maybe it would be a good idea to somehow visualize whether a port is an input-port OR an output-port... any ideas?

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