III-6039 - Improve dashboard styling

[vhande]

Changed

• imageUrl
• css

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Ticket: https://jira.uitdatabank.be/browse/III-6039

[sentry-io]

🔍 Existing Issues For Review

Your pull request is modifying functions with the following pre-existing issues:

📄 File: src/pages/dashboard/index.page.tsx

Function	Unhandled Issue
Dashboard	ReferenceError: textColor is not defined /dashboard Event Count: 5 Affected Users: 0
Dashboard	TypeError: useGetItemsByCreator is not a function /dashboar... Event Count: 1 Affected Users: 0
Dashboard	ReferenceError: textColor is not defined /dashboard Event Count: 1 Affected Users: 0
Dashboard	ReferenceError: tabKey is not defined /dashboard Event Count: 1 Affected Users: 0

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