Typographic issues

[autotel]

I was trying LightTable, but did not work for me, I figured I could be a bit helpful before removing it.
Typographies are displayed with two different kinds of issues.

Branch
stable, last release
To Reproduce
Kubuntu 18.04, Kde plasma version 5.12.9

Screenshots
This is how the main interface looks like:

• Minor typography glitches everywhere. If I report issue, it opens github page and interestingly the issues appear also there.

This is what the "open file" interface looks like:

Desktop (please complete the following information):

• OS: Kubuntu 18.04, plasma 5.12.9
• Version 0.8.1, binary 0.34.5

[OrdoFlammae]

Duplicate of #2343

[Mouvedia]

dupe of #2368 and #2343