Remove logical NOT operator where unnecessary and modify code

[Josephsanya]

Hi, this is an issue I found in the code.
The codebase is looking very old ES5 way and needs more of updating to improve the site.

I think this will help improve the map knitter site.

This issue is to fix the logical NOT operator, where it was inverted, fix double and single quotes, in the file src/edit/actions/ExportAction.js then other minor fixes in the file which may seem minor, but adds up to the improvement of the site.

I hope this little fixes help the map knitter site. THANKS.

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