Aligning remaining SVGs to WikimediaUI color palette.
Also:
- Aligning markup to each other, among others adding XML declaration
throughout or removing unnecessary `standalone=no` attribute.
- Optimizing with SVGO without prettified markup. Savings of up to
17% of file size.
Bug: T146799
Bug: T172850
Change-Id: I54a21932fd5df64b7716ac66a90de5af73776c23
a75c7fd257
