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