Description of problem: 

Yumex ignores certain theme settings, which makes it impossible see text.

Version-Release number of selected component (if applicable):

1.9.4 

How reproducible:

Every time

Steps to Reproduce:

1.Select a dark theme, or if one is not available select High Contrast Inverse.

2.Attempt to use yumex.

3.Be frustrated. :p
  
Actual results:

Yumex ignores theme values and defaults to using certain colors in order to
allow users to distinguish packages between updates, available and installed,
which is a nice thought, but fails in practice if a user is using a dark theme
since text blends into the background and becomes unreadable.

Expected results:

That yum either respect current theme values or completely disregard them,
adding a fallback list of colors for dark or High Contrast themes would be a
nice touch but changing the text colors to something that works well with both
might be easier.


Additional info:

Getting the left side panel to blend in also would be awesome, I was able to
change it through gtkrc but not without breaking a bunch of other stuff.
Maybe where it gets it's background info from could be changed?