Unifying BetaFeatures SVG screenshot markup by:
- changing `id`s for better readability,
- sorting attributes,
- using full pixel values where applicable and
- generalizing attributes on `g` where applicable
Also fixing a visual glitch in the RTL version.
Follows up Idace90e945a2bd5efa869ee717224274fd94e91a.
Bug: T180427
Change-Id: I57f2f4890e980992db2c25506bbdc330530d67b1