When hovering over a column’s title, a blue border appears, as well as icons for column type and formula.
When I then grab the box’s right border, my intent is to resize the column. What I need to see then is how the title will fit with the new size. The icons are in this case useless and, actually, annoying, since when space is tight, I have to guess what the exact size of the right part of title that they’re hiding is. I think removing them while the grab os in effect would be nice.