Add and use new header components

[olmoh]

Adds two new components:

• NavigationHeader
• MainHeader

These are implemented as logic agnostic components in the lib folder and extended and used in the app.

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This change is 

[linear]

DES-1150 Change paddings in main- & nav-header

[MarkusPettersson98]

Reviewed 1 of 1 files at r1, 1 of 1 files at r2, 1 of 1 files at r3, 2 of 2 files at r4, 1 of 1 files at r5, 6 of 6 files at r6, 6 of 6 files at r7, 1 of 1 files at r8, 10 of 10 files at r9, 8 of 8 files at r10, 33 of 33 files at r11, 2 of 2 files at r12, 1 of 1 files at r13, 6 of 6 files at r14, 6 of 6 files at r15, 1 of 1 files at r16, 10 of 10 files at r17, 7 of 8 files at r18.
Reviewable status: 14 of 79 files reviewed, all discussions resolved

[MarkusPettersson98]

Reviewed 1 of 8 files at r18, 5 of 5 files at r19, 33 of 35 files at r20, 1 of 1 files at r21, 15 of 15 files at r22, 9 of 9 files at r23, 1 of 1 files at r24, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved