This is bad, guys!
Once was the day (last week) you could sort all of your search results by artist, album, length OR popularity simply by clicking on the name of that column in the full search results view.
It's even mentioned in a "Solution" from last week.
Now, the column headings are unresponsive and there is now way to group the results of your search, like when you want to see different versions of the same song by one artist:

There seems to be some problems w/ the search function in other aspects of the redesign so perhaps a fix is in the works?
Spotify's greatest strength is the diversity of music accessible but people enjoy it in different ways, not just by popularity.
Please bring back sorting in search results! This is big hole!
2015-08-29
Hey folks, we're happy to announce this feature is rolling out to customers now. You will have sortable columns in search on Desktop coming your way. Thanks for your feedback everyone.