Fixes #774, adds spacing to message close icon, fixes z-index
Fixes #774, adds spacing to message close icon, fixes z-index

mohirt/Semantic-UI,davide/Semantic-UI,Semantic-Org/Semantic-UI-nl,kpedersen00/Semantic-UI-nl,pkaminski/Semantic-UI,Semantic-Org/Semantic-UI-nl,davide/Semantic-UI,pkaminski/Semantic-UI,Semantic-Org/Semantic-UI-nl,kpedersen00/Semantic-UI-nl,mohirt/Semantic-UI,Semantic-Org/Semantic-UI-nl