Set EnterAsTab to configuration dialog

[RalphLance]

Please create BBj windows with keyboard navigation flags set, so the TAB and ENTER keys can be used to go to the next control in the configuration window you can call up from the Plugin Manager.

$00010000$ - Activates keyboard navigation in the window.
$00800000$ - Sets the ENTER key to behave as a TAB key.

Alternative to the last flag, BBjWindow::setEnterAsTab(1) can be used after the window is created.