Unecessary re-renders

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Describe the bug
Using Highlighting Component Updates in React Chrome Dev tool, gives some insights on parts of the component that might be re-rendering unnecessarily.

Possibly linked to issue #150

To Reproduce
Steps to reproduce the behavior:

1. Go to 'Demo app'
2. Click on 'Load Demo'
3. open React dev tools, click on settings, and check box for 'highlight updates'
4. click 'play' btn
5. See colours hilights

Expected behavior

Fewer re-renders, and no re-render for components not involved in the playback (eg ToolTip)

Screenshots

Desktop (please complete the following information):

• OS:OSX 10.13.6
• Browser Chrome 74.0.3729.131
• Version 1.0.2

Additional context

• Make React Fast Again [Part 3]: Highlighting Component Updates

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Explored in branch PR/Branch #160

Seem to have found a way to reduce unnecessary re-renders using should component update 🚀

see how, "how does it work" btn doesn't re-render compared to previous gif

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addressed in #160 and currently in #175 soon to be merged into master, so closing for now