xfce.org: 150ms when using language selection list

[scootergrisen]

On https://xfce.org/ using the language selection list is delayed.

Caused by "transition:150ms all;" in 
https://cdn.xfce.org/style/css.php?site=www :

input[type="submit"],button,select{

     border-radius:0.2em;
     border:1px solid rgba( 0,0,0,0.2 );
     background:#f7f7f7 linear-gradient( to bottom,rgba( 255,255,255,0.5 
),rgba( 0,0,0,0.02 ) 1px,rgba( 0,0,0,0.05 ) ) repeat-x;
     color:#000;
     padding:0.2em 0.5em;
     outline:none !important;
     transition:150ms all;

}

So maybe someone can fix that so it works without delay.
I would also remove the color change where the text changes from black 
to blue on hover.