dismiss button position style fix

[otanim]

I've fixed style of position of content "dismiss" button, from this:

to this:

[coveralls]

Coverage remained the same at 95.911% when pulling 30b74dd6ef103ea533b0d808f0045545e7976756 on otanim:patch-1 into 012e088079dc053dd0a52160dbf9b5929cb365f0 on igorprado:master.