Bring HTML output window to front on ⌃⌥⌘H when not already key

Previously it would hide if already visible regardless of being the key window or not.
Add ability to close HTML output window on ⌃⌥⌘H
Update plist delta code
Support keys with dots in delta property lists functions
Treat most errors from exchangedata() as “not supported”

It seems to be a general trend with network file systems to return wrong errors when they do not support a certain feature (like extended attributes and atomic swap).
Checkin release notes
Commands with input set to none would not have stdin closed

This meant if such command would read from its stdin, it would hang.