Incorrectly Rounded Corners in GUI

[codayon]

Description

The corners for the window, looks weird. I think it will look better if they are not rounded.

Steps to Reproduce

1. Open OpenBangla Keyboard
2. Click on the logo of GUI
3. Select About OpenBangla Keyboard

Environment

OS: Arch Linux DE: KDE Plasma (Wayland) OBK: v3.0.0

Screenshot