SEAT-291, SEAT-292: removed unfetch, switched to inline svg

[tevo-nikita-ivashkov]

Jira: SEAT-291

Why / What

This PR replaces unfetch with fetch-ponyfill.
This PR disables UMD standalone build as current build setup breaks with fetch-ponyfill.

This PR also fixes icons for SEAT-292 as svg tools were one of potentials causes for build fails.

Testing

I tested this code by running test suit and manually checking build files.

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• Do you understand the reasoning behind the need for the changes?
• Given only new or existing tests*, do you feel confident that all changes work as intended and solve the problem at hand?
• Are all success and failure paths accounted for in the tests? If not, are the omissions explained/justified?
• If coverage ignores are present, is justification provided inline (or linked to) or is a link to a ticket to address in the future provided?
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[tevo-nikita-ivashkov]

Created a separate ticket to readd umd builds
https://ticketevolution.atlassian.net/browse/SEAT-293