Aligning SVGs to WikimediaUI color palette, optimizing
by help of SVGO and align markup to each other, among changes:
- unifying XML declaration
- removing `standalone=no` as it's default
- adding `viewBox` attribute for cross-browser compatibility
- removing unnecessary groups and ids where applicable
- unifying identation
- bringing attributes in order
Bug: T178867
Change-Id: Ie7803dd904cee14fa401331e082982794dc0a225