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I installed Arc Dark with the Numix icon set but the icons do not change in the launcher on the left, nor they change in the 'Show Applications' view. I installed everything via the GNOME Tweak Tool:
Any idea why?
sudo apt install arc-theme
when you install the Icon theme in this way
sudo apt-add-repository ppa:numix/ppa
sudo apt-get update
sudo apt-get install numix-icon-theme-circle
select Numix-Circle Icon theme..
Required, but never shown