Refactors KeymanWeb sample & test pages.

Additional fix to wix file for Keyman Developer

Refactor longpress text when it's generated by Id

Fix build issue with hyphen in identifier in kmdev.wxs

Currently on the touch layout, longpress for K_SPACE causes the app to crash because it is attempting to parse `K_SPACE` as an int for generating the longpress text.

- Clean up when key text is empty how it is parsed from Id
-Change Unicode hex string delimiter from `,0x` to `\\u` which makes it easier to read `executePopupKey()` in the logs.

Show all keyboard icons on toolbar in Keyman visual keyboard

Chirality support in Developer touch layout editor

Clarify macOS setup instructions

Re-capitalized Terminal, since it is the proper name of the program.

Android modifier chirality

Remove chirality test keyboard from main kmapro app
Fix KMSample2 compilation

Fix onKeyboardChanged signature

Revert to original onKeyboardChanged() signature

Cleanup code after moving chirality test to KMW event handler

Attempt to move to JS handler in KMManager

Updates to new onKeyboardChanged signature

Also incorporated external keyboard support to KMSample2

- Update In-app keyboard `isChiral` property when the OSK is shown
- Update System keyboard `isChiral` property on the event onKeyboardChanged()

This implementation comes out of the complication when in-app or system keyboard is changed, KMManager.setKeyboard is changing both keyboards

Addresses PR comment of not using a timeout that assumes keyboard is ready in preference of KMW event (keyboard loaded or changed)

This is still wip

* Document shift states and lock states in kmembedded.js, and standardize `lstates` parameter name
* Leave getActiveKeyboard() refactor as a TODO

Per review comments
* Rename chirality to keyboardHarness
* Change namespace to com.keyman.android.tests.keyboardHarness
* Add readme.md for info

Refactor KMManager.getActiveKeyboard()
Move modifierCodes to separate class
Clean up .gitignore

-Update KMEA to copy keyman-engine.aar to Tests/ for future test apps to consume.

This is follow-on to #300 for adding chirality modifiers to KMEA.

Add support for L/R Ctrl, Alt, caps lock, num lock, and scroll lock for external keyboard

- temporarily adding test chriality.js keyboard

[Windows] Points the offline help file's history section to help.keyman.com's history page.

[Web] Implementation of modifier chirality