Beta Feature: Make the SVG icons consistent with other Beta Features

* Set the width and height explicitly (so it works in IE).
* Set the width and height to the correct size (264x162, not 1024x768)
  in the viewBox and the explicit values.
* Drop the enable-background command which interferes.
* Set human-readable IDs for each component of the SVG.
* Run through svgo with the standard Wikimedia values.

Bug: T78141
Change-Id: I369b19815f239c1bf55a663ca54e52fbdea8a27c
Merge "Beta Feature: Make the SVG icons consistent with other Beta Features"