Field tabbing and Folder/File Browsing

This project needs only a few more features implemented to put it up
there with the best. My feature requests are:

1) Add property to WSCfileSelect to allow developer to specify a
default folder to start within. Right now a user must always start
browsing from their home directory. Borland Delphi file selection
dialog boxes typically have a "start in folder" property.

2) Add tab stops property to form controls to allow a user to tab
from control to control on a form. Most data entry forms support
the ability to use the tab key to tab from field to field on a form and
use the <Shift-tab> key to move the cursor to the prior field or
control. Also each control has a tab ordering property to allow the
specification for the order in which the cursor moves between
controls.

3) Drag-N-Drop support between windows and fields.