Poweroff and Suspend .desktop files titles are hardly legible

[brs17]

NOTE: Before reporting a bug, please check whether it also occurs with other themes.

If the bug also occurs with other themes (especially upstream default theme),
it is very likely an upstream issue.

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Reporter info

 * Distribution - (run ```lsb_release -a```)
 * Gtk+ 3.0 version - (run ```apt policy libgtk-3-0```)
 * Desktop environment - 
 * Pop version - (run ```head -n 3 /usr/share/gnome-shell/theme/pop.css```)

libgtk-3-0:
  Installed: 3.22.30-1ubuntu1
  Candidate: 3.22.30-1ubuntu1
  Version table:
 *** 3.22.30-1ubuntu1 500
        500 http://us.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
        100 /var/lib/dpkg/status

Pop!_GNOME+ Version 4.0.2

Actual issue
When searching for applications under the Activities list, the Poweroff and Suspend programs appear but the font color is different from other programs and illegible.