* Name change OSX -> macOS
fix commit c96b64e
This commit finishes remaining osx to macOS change, as well as replacing MacOS with macOS.
The reason for the later one is because the "correct" casing of macOS is like that. Apple styles it to looks like iOS, watchOS, tvOS, etc. And unfortunately they all start with a lowercase letter, making propercasing (or even title-casing) odd.
* fix casing of Linux, UNIX, and Windows
* Scope selection in the first screen. Since I couldn't detect if the
user is 'real' admin user, default is still per user.
* Scope is limited to per machine on servers. Though not perfect
(couldn't detect `DisableMSI` policy), it should handle #2389 better.
* For per machine, location can be changed by selecting Advanced.
Localization: modified templates from WiX toolkit support localization
very well. A short sample localization file for en-us is used.
* Dialog elements are moved to their own files.
