[Linux] Falkon KDE Plasma 5

**App name:** Launcher for Falkon browser app.

**Breeze theme icon:**
![480px-Breezeicons-apps-48-falkon svg](https://user-images.githubusercontent.com/37912316/89099399-2b943880-d3ef-11ea-99a6-569e8c2d0344.png)

**Launcher info:**
`Icon=falkon`

**Description:**
The browser that has replaced Qupzilla browser in KDE.