FYI, another way to fix it (worked for me just now, at least): in the Appearance > Themes > Essential > General settings, add the following to the Custom CSS field at the bottom:
.commands img {
display: initial;
}
This overrides the erroneous CSS without a hard-coded change, and seems safer than a deletion... I also tried "inherit" instead of "initial," but the latter seems to work slightly better.
-Sean