Give our apps a more neutral design

[Febakke]

Description

Today our apps have a very "Altinnsk" design. We have observed that this is something that can confuse the user to who the app owner is. We also want to create a design that multiple owners can use and our users can recognize across all apps.
We change the background color in our apps to a more neutral color.
Our blue color can be a little too "Altinn" and might take away from who is owning the application. We should also remove the "organization" icon in the header and change the color of the header.

Screenshots

Considerations

Describe input (beyond tasks) on how the user story should be solved can be put here.

Ops requirements

Are there any requirements for monitoring? What is being built and what could go wrong?
Are there any requirements related to backup?

Acceptance criteria

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Specification tasks

• Development tasks are defined

Development tasks

• Remove icon in header
• Background color grey
• Header color grey
• Back button dark blue border with white hover
• Close button dark blue border with red hover
• Modal shadow

Test

Add test cases here as checkboxes that are being tested as part of the changes.

Definition of done

Verify that this issue meets DoD (Only for project members) before closing.

• Documentation is updated (if relevant)
  • Technical documentation (docs.altinn.studio)
  • User documentation (altinn.github.io/docs)
• QA
• Manual test is complete (if relevant)
• Automated test is implemented (if relevant)
• All tasks in this userstory are closed (i.e. remaining tasks are moved to other user stories or marked obsolete)