* Consolidate `AddJSFile` into `LoadJSFile`
* Cleanup unnecessary vars, indentation
* Add TODO on adding 'android' and 'ios' platformSupports for the time being
* Revert .kxx in `utilfiletypes.pas`

Since some legacy keyboards aren't listed in a keyboards section of kmp.inf, need to revert how those kmx files get added.

Validation that  kmx / js file exists moved to apply only to release/ keyboards

Refactor MergeKeyboardInfo to handle these keyboard scenarios:

* JS file not in package (web only)
* KMP package with kmx files (desktop only)
* KMP package with JS files (mobile only)
* KMP package with kmx and JS files (desktop, android, ios)

## Changes ##
* Rename `FKMXFiles` to `FPackageKMXFileInfos`
* Create private var `FPackageJSFileInfos`
* Update `TMergeKeyboardInfo.LoadKMPFile` to populate `FPackageJSFileInfos`
* Rename `FJSFiles` to `FJSFileInfo`, change it from array to scalar, and apply only to js files outside package
* Update `LoadKMPFile` to use the Keyboards structure in `FKMPInfFile` to determine which files inside the package are keyboards (`FKMPInfFile.Keyboards`)
* Rename `CheckKMXFilenames` to `CheckPackageKetyboardFilenames` and update to report on .js and .kmx file inside the .kmp
* Update `kmxfile.GetKeyboardInfo` to read targets store and persist in KeyboardInfo
* Update `AddPlatformSupport` to account for targets

[Developer] Fixup persistence of untitled project state

[iOS] #1045 - cherry-pick: Quick (temp?) fix for OSK layout: disable animation

[iOS] #538 - Removed deprecated code to to support keyman: ad-hoc scheme

[Developer] Support drag and drop into monaco editor from Character Map

[Developer] First pass of managing code and char fonts in web text editor

[Developer] Add basic monarch syntax highlighting for .kmn

[Developer] Replace ACE editor with Monaco

[Developer] Prevent web requests from breaking out of our root path with ../

[Android] Add splash screen

Per review comment, don't delay app startup  just to display the text fields of the splash screen.

[Developer] Add FindErrorByOffset support for future use by JSON, XML editors

This addresses the Android platform of #1069

* Show product logos on app start
* Then show text (version and copyright dates)

[Developer] Maintain selection in web editor when saving or refreshing text

[Linux] Basic groundwork for kmflcomp to support v10 keyboards

[Developer] Show selected character range in character preview window, not just first character