I tried pinning the Calengoo app to the KDE Plasma panel to have the launcher always there, but it stops working after the app is closed - its icon also diappears.
When Calengoo is open, the panel looks like this:
As soon as I close Calengoo, it looks like this:
Clicking on it now gives me this error popup:
"This file doesn't exist anymore"
I also described the issue
in my distro's forum, and another user describes a rather complicated way to make it work, i.e. it's feasible to have the Calengoo launcher in the KDE Plasma panel, but apparently only in the Java 8 version now.
> Can we have this happening in the Flatpak version too? That would be great! I much prefer Flatpak for my apps if available.