[Mac] Refactored target-action call from keyView

10.0 stable release

P3S6 Beta to Alpha (final run?)

[Mac] #991 - Reverted changes for #872 (to solve more serious bugs)

[Mac] Fixes #894 - Fixed invocation of keyAction (missing self param)

Merge P3S6 beta to alpha

Updates to history

[Mac] Prevent permanently hiding OSK when a menu is dropped down

This *might* possibly fix #894, but not likely

[linux] packaging path variables

[web] Nextlayer property not transferred from base to prepended popup key.

[android] updateKMText was called with unescaped string in some contexts.

[Mac] Fixes #1005: Crash - CFRelease() called with NULL. Fixed existing unit test and added more.

[Mac] Removed call to "containsString" because it won't work in older OS

Fixes #1005 (at least in part). Still one failing test.

[Android] Update Info page

Merge P3S6 beta changes to master

[web] Pressing between keys gives wrong key

Bring in the current app info page from https://help.keyman.com/products/android/10.0/

* Update to Khmer Angkor
* Update images
* Removes references of sharing to Facebook
- Does not include cross-references to versions 2.0 and 10.0 since this is an offline info page.