Scrolling glitches with a minimap

[dmythro]

I thought it was Nova's issue but apparently, it is not. I turned off all extensions and with only this one enabled had such issues.

Steps:

1. Open a bigger file, and click on a minimap somewhere end of the file. It scrolls as expected.
2. Then click inside the editor somewhere to put a cursor — it gets scrolled to the top of the file.