[mac] [cherry-pick] [11.0] Merge fixes for #1838, #1839, #1840 into 11.0

[Android] Allow user to switch keyboard  on lock screen

Per PR comment set the globe key to:
1. switch to next Keyman keyboard
2. until all Keyman keyboards selected, then advance to next input mode

[Common] Update to Unicode 12.0

[Windows] [11.0] Add meta x-ua-compatible to all remaining XSL templates to avoid conflicts with system config of IE

[Windows] Add meta x-ua-compatible to all remaining XSL templates to avoid conflicts with system config of IE

[Windows] [11.0] Keyman32/keyman64 should detach without cleanup on process termination

[iOS 11.0] Patches issue with LTR/RTL codepoints in context.

[Web 11.0] Adds upper-cased variant of showPinnedHelp API

Merge pull request #1740 from keymanapp/windows-comapi-buffer-overrun-in-getdefaultkeyboardid-64-stable-11.0

[Windows] [11.0] Fix FieldWorks LT-19402, buffer overrun in GetDefaultKeyboardID for 64 bit

Merge branch 'stable-11.0' into windows-comapi-buffer-overrun-in-getdefaultkeyboardid-64-stable-11.0

[Developer] Calls to non-Unicode versions of ctype functions could cause instability

Merge pull request #1731 from keymanapp/developer-fix-broken-keycap-changes-in-touch-editor-1718-stable-11

[Developer] Fixes #1718. Edits to subkey caps in Developer 11 would not apply.