The following icons are only needed with JS enabled:
Page actions icons:
.mw-ui-icon-watch-invert:before
.mw-ui-icon-watched:before
.mw-ui-icon-watched-invert:before
.mw-ui-icon-edit-invert:before
.mw-ui-icon-edit-enabled-invert:before
Overlay icons:
.mw-ui-icon-previous:before
.mw-ui-icon-previous-invert:before
.mw-ui-icon-next:before
.mw-ui-icon-next-invert:before
We should thus make these separate icon RL module packs.