a.mention{
text-decoration: none !important;
}
a.mention span {
    text-decoration: none !important;
}
.mention.hashtag{
text-decoration: none !important;
}
.mention.hashtag.status-link{
text-decoration: none !important;
}
a.mention:hover span {
    text-decoration: wavy underline !important;
}
.mention.hashtag.status-link:hover{
text-decoration: wavy underline !important;
}