Move Launch OpenOCd checkbox to the top

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
Add a UI element to select path to the OpenOCD binary

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
Fix COM port selection being ignored

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>