This also gets the upload-symbols script, which seems to be necessary to upload the dSYM file for the Keyman Engine.

[Mac] #872 - Added Pages and Keynote as legacy apps

Merge pull request #929 from keymanapp/mac-675-make-kmp-confirmation-alert-property-of-configuration

[Mac] #675 - Double-clicking KMP shows config window with msg visible

This allows them to retain font/style information when a character sequence causes the character(s) holding that info to be replaced.

[Developer] Don't left-trim comment lines in source.

history.md updates

Fixup email support link in help for Windows

[Windows] Fixes a problem where "Castilian" was shown instead of "Spanish"

[Windows] Keyboard Options dialog no longer crashes on save.

[Windows] Avoid crashing if a kvk file is invalid in a package.

[Mac] #769 added dSYM for engine so symbols will be available in Crashlytics

[Developer] Make it easy for developers to install a .kmp from the Web Debugger

[Developer] Hide Debug Status form in Test Mode, prevents uninitialised data errors

[Developer] Improve support for BCP 47 in Package Editor

[Android] Improve intent-filter 

Fixes #885. Fixes #891. Canonicalizes, as far as possible, new language IDs as keyboards added to package

[Developer] Prevents a crash when Keyman Developer attempts to load an invalid project file.

Fixes sillsdev/keyman-issues#5568. Prevents a crash when Keyman Developer attempts to load an invalid project file.

[Developer] Fix for crash in Developer restarting regression test batch half-way through the batch.

Fixes sillsdev/keyman-issues#5557. Hide Debug Status form in Test Mode, prevents uninitialised data errors.

[Developer] For new keyboard layouts, touch layout files will have .keyman-touch-layout extension

[Windows] Incorrect icons caused by lookup against non-installed language profile.

Fixes sillsdev/keyman-issues#5411. Crash in Developer restarting regression test batch half-way through the batch.

Fixes #902

Update the intent-filter for file scheme (based on BloomReader's [AndroidManifest.xml](https://github.com/BloomBooks/BloomReader/blob/master/app/src/main/AndroidManifest.xml))

[Developer] The debugger should check that build succeeded before attempting to start.