bartekch

@phoward38 thanks, works! Although the button looks a bit uglier than those with `btn` class,  Is it possible to achieve the same button style? I guess I could provide...

@phoward38 great, thanks! It works perfectly. Although indeed `icon` argument would be more convenient, so I'm looking forward to this feature.

For me a convenient solution to this problem is to wrap `eventExpr` inside `req`. When silent `req` exception is raised inside `eventExpr`, observer is not executed, but what is more...