[sailfish-browser] Fix long input select open faster. Fixes JB#8453
[sailfish-browser] Fix long input select open faster. Fixes JB#8453

Good example for testing is nettiauto.com and selecting "merkki" from
right hand side of the page.

sailfishos/sailfish-browser,sailfishos/sailfish-browser,alinelena/sailfish-browser,alinelena/sailfish-browser,rojkov/sailfish-browser,alinelena/sailfish-browser,rojkov/sailfish-browser,sailfishos/sailfish-browser,alinelena/sailfish-browser,sailfishos/sailfish-browser,sailfishos/sailfish-browser,rojkov/sailfish-browser