The approval card's Skip-all button drew its icon twice: once from the
.approval-btn-icon span in static/index.html and again from the leading
glyph baked into the approval_skip_all translation in 14 of 15 locales.
pt already shipped without the prefix, which is the correct shape.
Strip the glyph from every locale value so the markup span is the single
icon source, matching Allow once / Allow session / Always allow / Deny,
which all pair an icon element with a glyph-free label.
test_vietnamese_locale.py asserted the old prefixed string verbatim; its
expectation is updated to the corrected value.