[Linux] App-name: color-picker, pamac-manager (system tray), education (kicker), help (kicker). DE: KDE Plasma

[Leinatan]

Describe the bug
Missing/inconsistent icons for the panel and application launcher menu

To Reproduce
Steps to reproduce the behavior:

1. Login (KDE Plasma on Manjaro)
2. Navigate
3. Notice missing or inconsistent icons:
   color-picker (inconsistent, ugly)
   pamac-manager system tray (no dark variant)
   Education category (in application launcher)
   Help category (in application launcher)

Screenshots

Desktop (please complete the following information):

• OS: Manjaro stable
• DE: KDE