Catch escape on top layer + tooltip dismiss on escape

[idoros]

Allow layer to handle escape press

• [ ] implement layer escHandler (with custom event to allow it to stopPropagation/preventDefault)
  • capture escape press on document
  • if target is contained within the top layer
    • let event go through and catch on layer when it propagate back (check if canceled and remove listener - nextAnimationFrame?)
    • if event isn't prevented or stopped then call top layer escHandler
    • if target is outside then call top layer escHandler
• [ ] implement dismiss with escape for Tooltip