Allow surrounding spaces in mode name
Allow surrounding spaces in mode name

This makes it possible to define a mode name with surrounding spaces if
so desired. e.g.:

    mode "   hello   " {  }

4e554c4c/sway,1ace/sway,taiyu-len/sway,crondog/sway,ptMuta/sway,sleep-walker/sway,1ace/sway,4e554c4c/sway,taiyu-len/sway,ascent12/sway,SirCmpwn/sway,ascent12/sway,sleep-walker/sway,1ace/sway,taiyu-len/sway,johalun/sway,crondog/sway,ascent12/sway,mikkeloscar/sway,mikkeloscar/sway