Returns the button dismissal alignment, one of <code>LEFT</code> or <code>RIGHT</code>.
The button dismissal alignment is the ordering that should be used when positioning the
default dismissal button for a dialog. For example, in a dialog that contains an OK and
CANCEL button, on platforms where the button dismissal alignment is <code>LEFT</code>, the
button ordering should be OK/CANCEL. When button dismissal alignment is <code>RIGHT</code>,
the button ordering should be CANCEL/OK.
@return the button dismissal order
@exception SWTException <ul>
<li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
<li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
</ul>
Returns the button dismissal alignment, one of <code>LEFT</code> or <code>RIGHT</code>. The button dismissal alignment is the ordering that should be used when positioning the default dismissal button for a dialog. For example, in a dialog that contains an OK and CANCEL button, on platforms where the button dismissal alignment is <code>LEFT</code>, the button ordering should be OK/CANCEL. When button dismissal alignment is <code>RIGHT</code>, the button ordering should be CANCEL/OK.
@return the button dismissal order
@exception SWTException <ul> <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li> </ul>
@since 2.1