Added "cursor: pointer" for the clickable class in icon.less
Added "cursor: pointer" for the clickable class in icon.less

- Used for clickable icons created handily as spans, without `a` tag, like in cargomedia/fuboo#785

mariansollmann/CM,christopheschwyzer/CM,alexispeter/CM,christopheschwyzer/CM,fauvel/CM,cargomedia/CM,njam/CM,tomaszdurka/CM,njam/CM,alexispeter/CM,fvovan/CM,mariansollmann/CM,zazabe/cm,mariansollmann/CM,vogdb/cm,fvovan/CM,fauvel/CM,fvovan/CM,alexispeter/CM,tomaszdurka/CM,mariansollmann/CM,cargomedia/CM,christopheschwyzer/CM,alexispeter/CM,fauvel/CM,vogdb/cm,cargomedia/CM,fvovan/CM,zazabe/cm,njam/CM,vogdb/cm,christopheschwyzer/CM,njam/CM,cargomedia/CM,tomaszdurka/CM,tomaszdurka/CM,fauvel/CM,zazabe/cm,vogdb/cm,tomaszdurka/CM,fauvel/CM,zazabe/cm,njam/CM,vogdb/cm