[BUG] `signal-desktop`'s icon doesn't show in the taskbar

[alfdupont]

Describe the bug Regardless of the chosen icon theme (Adwaita, Beautyline, Papirus), when signal-desktop is open, its button in the taskbar is present but has no icon

To Reproduce Steps to reproduce the behavior:

1. Launch signal-desktop
2. See that despite the window being open, the button in the taskbar has no icon on it

Expected behavior As for other applications, I expected to see the icon, since it is present in the relevant /usr/share/icons directory

Screenshots

Desktop (please complete the following information):

• Linux distribution: Archlinux 5.19.1-arch2-1
• Sway version sway -v: sway version 1.7
• Panel version nwg-panel -v: nwg-panel version 0.7.4

Additional context Add any other context about the problem here.

[nwg-piotr]

This is actually a bug, not in the panel, but in Signal packaging: ambiguous names. The desktop file should be called signal.desktop, not signal-desktop.desktop, since the window_class value is "Signal".

You may work it around on your side:

1. Copy /usr/share/applications/signal-desktop.desktop to ~/.local/share/applications/ and rename it to signal.desktop.
2. To avoid duplicate icon in launchers, copy /usr/share/applications/signal-desktop.desktop to ~/.local/share/applications/ again, edit the destination file and add NoDisplay=true at the bottom.