Libre Office writer: icon theme set unchangeably to barely usable theme when using Mint-Y dark

In Libre Office Writer (version 6 and 6.1), the icon theme is unchangeable when (and only when) one uses the Mint-Y dark control theme. The result of the fixed Writer theme combined with Mint-Y dark is very dark icons that become a rather grey blur when moused-over.

In short, a popular version of Mint's flagship theme makes Writer - a flagship Mint application, and one installed on Mint by default - very hard to use.

Video showing the problem.

The problem persists: one of the most popular, and user-friendly versions of Linux - namely, Linux Mint - does not work properly with the most popular office Linux suite. Not good!

A possible workaround - for the problem as manifest in Ubuntu - is here. But the workaround does not work on Mint when one uses a dark system theme.

See also the problems reported here on the Mint forum.

What worked for me (though the user should not have to do such things, I feel):

totally remove everything libre-office related
reinstall L.O. via Software Manager
Manually install libreoffice-gtk2 (and a dependency).

The result of all of this is a Libre Office that both fits my system theme and has readable icons.

EDIT: but then for some reason only Writer was installed; I had to install Calc (and any other components I wanted, and even the integrated help) separately.