Align SVG markup across Foundation products by:
- unifying XML declaration,
- removing unnecessary `standalone="no"` attribute as it's default,
- removing all `g` group elements where applicable,
- bringing attributes in order,
- removing unnecessary ids and
- unifying whitespace.
Bug: T178867
Change-Id: Id3799a46c14f793636ca9bca3ad0f642466ed5a0
This commit only adds the beta feature parameters and preference.
The API will need to check whether the feature is enabled.
The beta feature option is behind a feature flag
$wgEchoUseCrossWikiBetaFeature, that must be set to true for
the beta feature to appear on the wiki.
Bug: T114237
Change-Id: I61e1bd62571e55f7f685f64e0c37e7702875e407