'Note' function on ProfileConnect dialog fails when not in tree view mode

[dragnldy]

EditNote_Click event doesn't test to see if form in 'tree' view format and throws an error because it doesn't check to see if the _profiles.SelectedNode is null. Also the form is being positioned relative to the overall window and subsequently can end up hidden behind the form. Should be positioned relative to its parent. Here is some corrected code.