Remove incomplete host-platform OS behaviour API and its platform-specific conditionals. Derive window buttons, title, and title bar layout from window view's own theme, and select platform variants through a private function.
* CPApplication.j: Remove setOSBehavior:, OSBehavior, shouldMimicWindows and the simulatesWindows accessors, with the Info.plist keys and user default they read; set the default theme through _CPThemeVariant.
* CPApplication_Constants.j: Remove the OS behaviour constants, dictionary and notification.
* CPCompatibility.j: Add _CPBrowserOperatingSystem, returning the detected host operating system.
* CPTheme.j: Remove CPThemeStateWindowsPlatform; add _CPThemeVariant, returning the base theme.
* CPWindow.j: Remove the _close call to the window view.
* _CPStandardWindowView.j:
- Remove the OS behaviour observer, _close and _osBehaviorDidChange:.
- Place the buttons and title from theme values on every layout, with fixed defaults where a theme supplies none.
- Read title bar and sheet values from the window view's theme instead of the default theme.
* _CPTitleableWindowView.j: Read title-margin at layout time instead of caching it.
David Richardson
d55a620223