Use Glass Stage icons for playlist and offline controls

frontend/glass-controls.test.js

@@ -7,3 +7,9 @@ test('glass icon substitution preserves leading whitespace and remaining labels'
  assert.equal(leadingGlyph('Clear all'),null);
  assert.equal(leadingGlyph('⏸').kind,'pause');
 });
+
+test('playlist trash, menu and music glyphs use drawn glass icons',()=>{
+ assert.equal(leadingGlyph('🗑️ Delete').kind,'trash');
+ assert.equal(leadingGlyph('⋮').kind,'more');
+ assert.equal(leadingGlyph('🎵').kind,'music');
+});