Add a new class to all buttons caption (enhancement)

[GLLM]

I find that the caption/text next to the icon is not always needed (favorite/share ...) and would prefer to hide it and keep only the icon.

I've added (locally) a new <span class="button-caption">...</span> to many buttons, but did not manage to hide the caption by CSS afterwards.

Note : I would not hide the captions for the very top menu bar.

What's your idea on this ?

GLLM