Inlogbutton/uitlogbutton is groter dan de registreerbutton

<img width="709" alt="Screenshot 2024-04-17 at 10 24 37" src="https://github.com/fdnd-agency/cmd/assets/112855849/618763af-3f6c-4403-957d-5c062c7044d3">

Dit komt door:
`<Icon iconSrc="/images/icons/arrow-right.svg" --icon-width="1.4rem"></Icon>`

In button.svelte
