Run node-svgo to crush all SVGs whilst retaining readibility

svgo --pretty \
     --disable=removeXMLProcInst \
     --disable=cleanupIDs \
     --disable=collapseGroups \
     -f …

Change-Id: I7e867a51feebb2799e6d4cdca455ee7534ec6a24
Provide the (currently-unused) external link icon in LTR and RTL variants

Change-Id: Ifb2041545689d9e5ecfd9184cd46d59f4854157d
Merge "Run node-svgo to crush all SVGs whilst retaining readibility"
Merge "Provide the (currently-unused) external link icon in LTR and RTL variants"