Tray icon of uninstalled game(s)

[TriMoon]

Your system information

• Steam client version (build number or date): Feb 18 2019 22:09:18
• Distribution (e.g. Ubuntu): Kubuntu 18.10
• Opted into Steam client beta?: [Yes/No] No idea, i used the default installer from kubuntu software
• Have you checked for system updates?: [Yes/No] Yes

Please describe your issue in as much detail as possible:

When you install a new game you get two options:
To create a desktop icon and a startmenu entry.
What i would like to do is remove the menu entry for a game, that i have uninstalled, from the tray-icon menu of steam.
You know the list of games you get when you right click the tray icon of steam.

Steps for reproducing this issue:

1. Install a new game
2. Check the tray icon menu. It should show the new game.
3. Uninstall the game. The game is still shown in the tray icon menu.