Fixed TraktTV CSS Import and Suggestions

I applied the 'miniposter' look to the trakt.tv suggestions instead of the import log, wups.
Add miniposter to trakt.tv suggestions
CSS fixes

serieheader > div : to my knowledge, this is an un-needed fallback style that causes issues with tooltips sometimes
.tooltip .tooltip-arrow : fixes the arrow being black (and unseen) when the tooltip appears below the element
Trakt.tv serieheader fix

More of an OCD consistency thing.