How to remove rounded corners when selecting text in sublime text 3?

Question

IDE

Either pixelation, or the devil knows what, depending on the monitor. How to disable this horror?
The only little thing that is an eyesore in sublime.
In dark themes it is not so noticeable, but most of the time I work in light. I'm attaching a screenshot, words can not describe.
I couldn't find anything on the internet, maybe I googled it wrong.
Thank you.