Fixes #552 Generic ascending/descending icon was overriding some other sort icons. Fixes #552

src/elements/icon.less

@@ -353,12 +353,12 @@ i.icon.signal:before { content: "\f012"; }
 i.icon.sitemap:before { content: "\f0e8"; }
 i.icon.skype:before { content: "\f17e"; }
 i.icon.smile:before { content: "\f118"; }
+i.icon.sort.ascending:before { content: "\f0de"; }
+i.icon.sort.descending:before { content: "\f0dd"; }
 i.icon.sort.alphabet.descending:before { content: "\f15e"; }
 i.icon.sort.alphabet:before { content: "\f15d"; }
-i.icon.sort.ascending:before { content: "\f0de"; }
 i.icon.sort.attributes.descending:before { content: "\f161"; }
 i.icon.sort.attributes:before { content: "\f160"; }
-i.icon.sort.descending:before { content: "\f0dd"; }
 i.icon.sort.order.descending:before { content: "\f163"; }
 i.icon.sort.order:before { content: "\f162"; }
 i.icon.sort:before { content: "\f0dc"; }