<select>/<option> is note styled correctly

[tukusejssirs]

Although <select>/<option> works out of box, IMO it is not styled correctly:

• it uses same background colour as the page background and thus one might think it is such a static text (i.e. there is no rectangle and/or arrow to tell the user it is a rolling box);
• the text colour is black (#000000) on both dark and light themes.

Tested on Wiki.js 2.5.201.