Show TJvBrowseForFolderDialog on active monitor

When showing TJvBrowseForFolderDialog, check the monitor of the parent window instead of always using the primary monitor. This fixes http://issuetracker.delphi-jedi.org/view.php?id=6230.
Merge pull request #15 from joshkel/jvbrowsefolder-monitor

Show TJvBrowseForFolderDialog on active monitor