When creating a filter to highlight matching posts with a color, only a thin line appears at the left of the post

[darkred]

I made this filter:
Pattern: /.*webm/
Type: Filename
Color: Yellow

This how the post becomes:
(i.e. only a thin line appears at the left of the post - In fact a box-shadow CSS rule is applied)

Shouldn't the post become entirely yellow? (i.e. a background-color CSS rule, instead)
I'm asking because, currently it's not very easy to spot them.

[desuwa]

This is working as intended.

We'll add a way to customise css rules some time later.