Change js file name from cpkUI to sparkle + few other fixes
Merge branch 'master' of https://github.com/webdetails/cpk

# By Maria Carina Roldan (2) and Paulo (2)
# Via Maria Carina Roldan
* 'master' of https://github.com/webdetails/cpk:
  list elements
  add border to delete button
  edit and delete buttons css
  abort if plugin exists