Styling for upload modal

Description

For pr-mattermost-plugin-workflow-28, there's a bit of styling needed. Let me know if you need help, but I was thinking you could make the changes directly and upload a commit to the PR?

QA Test Steps

No testing required.

Status

Mana

2

Assignee

Asaad Mahmood

QA Assignee

None

Reporter

Christopher Poile

Epic Link

None

Fix versions

None

Mattermost Team

Integrations

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QA Testing Areas

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GitHub Issue

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