So I'm kinda new to Linux, just installed Lubuntu and love it.
I have this "minimize all windows" button in my panel (next to bluetooth, battery, wi-fi etc...) but it's kinda ugly and I'd like to give it a symbolic icon from the icon set I use so it matches the rest of my applets.
I thought I just need to right click and then go to "Minimize All Windows" settings but there's only one tickable option which says "alternately iconify/shade and raise", but it doesn't seem to do anything for me.
So is there a way to change a panel applet's icon? Maybe manually? I'm using Lubuntu 17.10 and LXPanel 0.9.3 for LXDE.