Tadej Panjtar

The cursor is leaves visible screen when you move down in window below last visible line. It came back when you move up again. [demo video](https://drive.google.com/file/d/17wEnorWHtDaF_mrjkd-yXJF1FkOe9r21/view)

When font color is changed according to syntax it looks like this causes next characters also shifted to the left. [demo video](https://drive.google.com/file/d/17wEnorWHtDaF_mrjkd-yXJF1FkOe9r21/view)

I took @krussjos 's branch to port source code on qt6. But I realized that even default compiling on qt5 does not render keyboard right. Please see attached image (tested...