Function in button widgets is called twice

[AlexandrTomin]

This change will be avoid twice click of button.

if (event.type === "mousemove") {break;} to if (event.type === "mousedown") {break;}

[atlasan]

This is true. I would instead change the code to call the function only with the correct event instead of breaking on a "bad" one.

if (event.type === "mousedown"){ // or "mouseup" ?

}

[jagenjo]

hard to do the merge, the automatic gets crazy