New behavior for F1

New behavior for F1
Press on F1 give help window with index list and open nearest root page
And You must click on first item in index list for show correct page
Also must be include namespace for variables defined in another unit

Example:
Press on ReportMemoryLeaksOnShutdown give help for System.boolean
but press on System.ReportMemoryLeaksOnShutdown or press on ReportMemoryLeaksOnShutdown inside System unit give help for System.ReportMemoryLeaksOnShutdown but must click in help index window on item System.ReportMemoryLeaksOnShutdown