In-Editor API documentation display aberration in 3.4

[snougo]

Godot version

3.4 rc3

System information

MacOS 11.6.1 Big Sur Intel CPU and Intel GPU

Issue description

this issue appeared in some beta version, but I can't remember which version is, sorry report it so late

in 3.4 rc3

in 3.3.4 stable

Steps to reproduce

just search some help in editor

Minimal reproduction project

No response

[akien-mga]

I can't reproduce the issue on Linux with 3.4 RC 3 and the default theme.

Which theme configuration are you using?

[snougo]

I can't reproduce the issue on Linux with 3.4 RC 3 and the default theme.

Which theme configuration are you using?

I just changed default theme color settings and didn't use any other theme

[Calinou]

I can reproduce this on 3.5.beta.custom_build [a79e4d0] on Linux, but only when setting the font hinting to None in the Editor Settings. It happens regardless of display scaling and persists after restarting the editor.

200% scaling

200% scaling (font hinting set to None in the Project Settings)

[akien-mga]

CC @bruvzg

[bruvzg]

It's a regression from #52752, probably some of horizontal offsets were not converted to float.

[Calinou]

I could reproduce the issue in 3.4beta6, but not 3.4beta5. Note that fonts within RichTextLabel also look significantly blurrier since 3.4beta6 when hinting is disabled:

3.4beta5

3.4beta6

[akien-mga]

CC @Listwon

[akien-mga]

Fixed by #55440.