remove 'for' from header user name if username or orgname is empty
change some texts and max-widths to reflect design
store title and selected system directly in RTK to prevent users using back+forward buttons in the browser to select a different system that is reflected in the rightsincluded page
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[ ] Your code builds clean without any errors or warnings
[ ] Manual testing done (required)
[ ] Relevant automated test added (if you find this hard, leave it and we'll help out)
[ ] All tests run green
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[ ] User documentation is updated with a separate linked PR in altinn-studio-docs. (if applicable)
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