Inverse PF Logo showing on multiple react demo examples

[lboehling]

There are multiple full page demos where the PF logo is showing in inverse on light theme

so far we've seen this on

• banner react demos
• wizard demos
• jumplinks demos
• data list demos
• nav demos

[tlabaj]

Let's make sure all demos have the correct logo.

[rebeccaalpert]

This should be all set on https://staging-v6.patternfly.org now!