Bug#890845: HighContrast icon theme doesn't work with GTK3

[Yuri D'Elia]

On Mon, Feb 19 2018, Jeremy Bicha wrote:
> Ok, I looked closer and this doesn't appear to be a Tweaks bug. And I
> can't reproduce the issue at all.
>
> On Mon, Feb 19, 2018 at 4:01 PM, Yuri D'Elia <wavexx at thregr.org> wrote:
>> Since the last update, the "HighContrast" icon theme only works for GTK2
>> programs.
>> GTK3 programs seem stuck with the default (tango?) theme.
>
> Which GTK3 program?

Any. "gxmessage test" shows another icon on the ok button, for example.
(probably from the adwaita icon theme? I'm actually not sure). I only
ever used the HighContrast theme.

> How are you setting the HighContrast icon theme?

I set this using lxappearance, which basically sets
gtk-icon-theme-name=HighContrast in ~/.config/gtk-3.0/settings.ini

> What desktop are you using?

I'm not using any DE.

I noticed the change because the File Open Dialog of FF (for example,
it's currently using GTK3) has now the tango/ icons instead of the
HighContrast I usually use. But Inkscape, which is still GTK2, still
retains the HighContrast icon.