I have been using the shadow/highlights adjustment to bring out the
detail in some of my lighter colored subjects (for example, a white
cat.

Everytime I choose shadow/highlights, it opens a dialog box and
automatically sets the shadow for 50%. I almost always set this to 0
and use only the highlight slider. Is there some way to set this to
open with both sliders set to 0? It gets really annoying to have to
change this every single time when I don't even want to adjust that
one.