Dark theme saved search table field value are obscured by filter overlay

[zofog]

Kibana version: v5.5.0

Elasticsearch version: v5.5.0

Server OS version: Windows Server 2012 R2

Browser version: Chrome 60.0.3112.90 (Official Build) (64-bit)

Browser OS version: Windows 10

Original install method (e.g. download page, yum, from source, etc.): Download page

Description of the problem including expected versus actual behavior:

Dark theme saved search table field value are obscured by filter overlay. See attached screenshot.

[cjcenizal]

CC @stacey-gammon since you worked on something similar recently. :)

[nreese]

able to reproduce in 7.0.0-alpha1