gEDA-dev: Component selector dialog

[Ales Hvezda]

>Before we each expend the effort to make a change, perhaps we can
>agree on what functionality changes will be acceptable to the project?

Acceptable changes:

1) Close button -> closes the dialog box with no further action.

2) Apply button -> keeps the dialog box open and starts placing the 
   currently selected dialog box.

3) OK button -> closes dialog box and goes into place mode.  
   Cancel/Escape puts you back into select mode and does not resurrect
   the dialog box.

4) The OK and Apply buttons should be disabled if no component is selected.

5) I'm not too thrilled with the Refresh button.  I understand why it was
   added, but if there is another portable mechanism to automatically
   refresh the list, we should endeavor to use it.

6) The Refresh button is not at the same level of importance as "Ok",
   "Close", or "Apply".  It should not be down there at that horizontal
   position with the other buttons.

								-Ales