update the DOM API so that we implement using the property style access of properties which work natively in JS and avoid using getter/setter methods in the DOM library so that they can easily compile to JS too from the same org.w3c.dom API on the JVM

made the test case fail if there is a compile error - and temporarily commented out a few JS library files that don't compile yet

KT-1672 Don't complete import java.lang.reflect.Array when Array is typed at the beginning of a line
 #KT-1672 fixed

(move duplicate code into it)

 #KT-2111 fixed

(Not my day, apparently)

 #KT-2125 fixed