Hello MarcW.
To get the name like you want put this code
set(plugin[get(thumbname)].scenetitle, get(scene[get(i)].title) );
set(plugin[get(thumbname)].onhover,showtext(get(scenetitle), buttonstyle);); - Dont forget txtstyle on your code on this case is buttonstyle
after this code
set(layer[get(thumbname)].linkedscene, get(scene[get(i)].name) );
regards