HR fix for issue #235252

Hello,

I would like to ask for the review of the fix issue #235252 - Completion 
for location object is broken without preceding window

https://netbeans.org/bugzilla/show_bug.cgi?id=235252

The global variables in JavaScript are also all properties of window 
object, if the source file is targeted to run in a browser. window 
object is a copy of Window object plus many properties.

When a global variable is resolved, then NetBeans find out, whether the 
global variable is not a property of window object, but doesn't look 
whether is a property of Window.prototype object. The fix correct this.

There shouldn't be a risk of the fix. It looks to the index for all 
properties of Window.prototype object and returns the right type, if 
such property exists.

Petr Hejl is reviewing the fix and Vlada Riha will verify it for QA.

Thanks,
Petr