I have just installed Linux Mint 19 which comes with LO 6.0.3.2; I was using LO5 until now.
In Calc, the items in the context menus do not have an icon anymore: is this a bug on my system (theme-related or whatever), or a “feature” of version 6 or of the icon theme (I tried both Tango and Galaxy)?
I’m using LibreOffice 6.0.3.2 under Ubuntu LTS 18.04 and I too have no icons under the context menus… It looks like this is a feature of LibreOffice 6.x.
I know it’s a hack, but I copied the settings directory from LO5 (~.config/libreoffice/4) into the new installation of LO7.
The icons are where they were in LO5.
For now, I consider it a provisional starting point, I want to look at the differences in the configuration files of individual installations (LO5 and LO7). I have not yet found anything in the LO7 settings, nor in the individual menu settings.
(My OS: Arch Linux, desktop Xfce)