fix(React/table-colorizer): display proper error message. fixes #336

[proghax333]

fix(React/Table Colorizer): display proper error message. fixes #336

Title : Fix (React/Table Colorizer) invalid input handling logic.

Issue No. : #336

Code Stack : React

Close #336

Checklist:

• [x] I have mentioned the issue number in my Pull Request.
• [x] I have commented my code, particularly in hard-to-understand areas
• [ ] I have created a helpful and easy to understand README.md
• [x] I have updated the Index.html file for my contribution

Notes

• No additional changes to the styles (except for introduction of a style rule for the error text message) have been made.
• Some refactoring/fixing has been done to the Clear Me button enable proper functioning of error text message.

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