Bug 1015309 - Update the default and English symbol panel.
 - Update the layout definition and the alternateLayout part to align with the default symbol panel 1.
 - Don't add special chars at symbol panels for type=email, url.
 - Remove hidden/visible property for symbol panel.
Merge pull request #22567 from RudyLu/keyboard/Bug1015309-symbol_layout_refinement

Bug 1015309 - Update the default and English symbol panel.
r=timdream.