Add away to run mutliple policy triggers from a single action

[charliwest]

It would be good to be able to create an array of policies to look something like this in the config:-

<dict>
	<key>icon</key>
	<string>https://url/</string>
	<key>label</key>
	<string>Basic Set up</string>
	<key>policy</key>
            <array>
	       <string>installDockutil</string>
	       <string>installDesktoppr</string>
	       <string>SetComputerName</string>
            </array>
</dict>

This way for one label we could run multiple smaller policies that don't need their own app icon or similar.