[SHEL-1310] Update No Seating Chart Copy and Graphic

[bsl782]

Jira: SHEL-1310

Why / What

This PR adds the missing seatmap icon and centers the icon and text.

Testing

I tested this code manually.

Reviewer Checklist (To be edited and marked by approver)

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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?
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[tevo-nikita-ivashkov]

lgtm