escape-key on FormulaBar empties input

[Steven]

If you hit the ESC key in FormulaBar input on a filled cell, the formula value (editorValue) get lost.

This behavior is reproducible:

• Type a value on a Cell "A1"
• Focus the formula in FormulaBar
• Hit ESC key
  • now, the value of "A1" will be empty
• Focus another Cell and the displayValue is also gone