Please add a preference for "Show Desktop" to turn off its tooltip.
I have the "Show Desktop" taskbar plugin in the bottom-right corner of my screen, approximating a classic-ish Windows desktop. Sadly, my mouse cursor many times a day naturally ends up in the bottom-right pixel/area (I can't help it), which means it hovers the "Show Desktop" button, which makes it show its annoying tooltip which in turn visually blocks an important input field in a program I have open a lot of the time.
There is no setting in the plugin's minimal preferences GUI to turn it off.
I've asked and searched a lot to find a workaround, but the only way is to add a ~/.config/gtk-3.0/gtk.css rule to turn off tooltips completely. Unfortunately, that also turns off the tooltips on webpages inside Firefox, which makes it unusable. Also, I don't want to turn off tooltips completely even in the Xfce GUI -- only this specific thing as well as the ones shown in Thunar's Side Pane (I made a separate issue for that).
I actually wasted a lot of time figuring out how to rebuild the "Show Desktop" plugin from source code, which I modified to not show the tooltip, but this required me to install a ton of packages and it feels like I've made a mess of my system by doing that. I also will have to repeat the process anytime Xfce is updated. It's thus unsustainable in the long run, and it would especially be impossible to try to talk a "normal person" through that process after I have set up Linux and Xfce for them and they ask me about how to turn this off...
Please add a way to turn those pointless tooltips off in the plugin's preferences, or at least through some config file!