RFR: 8314968: Public InputMap

[Andy Goryachev]

Summary:
- public InputMap, KeyBinding, BehaviorBase in javafx.scene.control.behavior package
- InputMap allows for adding key mappings on control (user-defined) and behavior (defined by the skin) levels
- two stage mapping: key binding -> function tag -> function; enables a wide range of control customization (in some cases even without subclassing behavior classes)

For more detailed introduction, see
https://gist.github.com/andy-goryachev-oracle/294d8e4b3094fe16f8d55f6dd8b21c09

A number of Controls has been converted to use the new InputMap implementation:

- ColorPicker
- ComboBox
- DatePicker
- PasswordField
- TextArea
- TextField

This PR requires https://github.com/openjdk/jfx/pull/1221 to go in first.

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Commit messages:
 - Merge remote-tracking branch 'origin/master' into 8314968.input.map
 - Merge branch '8314906.behavior.test' into 8314968.input.map
 - review comments
 - Merge remote-tracking branch 'origin/master' into 8314968.input.map
 - spelling
 - Merge branch '8314906.behavior.test' into 8314968.input.map
 - review comments
 - Merge remote-tracking branch 'origin/master' into 8314906.behavior.test
 - whitespace
 - whitespace
 - ... and 128 more: https://git.openjdk.org/jfx/compare/f76437da...9df9b60f

Changes: https://git.openjdk.org/jfx/pull/1254/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1254&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8314968
  Stats: 3165 lines in 33 files changed: 2369 ins; 358 del; 438 mod
  Patch: https://git.openjdk.org/jfx/pull/1254.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1254/head:pull/1254

PR: https://git.openjdk.org/jfx/pull/1254