Merge branch 'bshah/pmc2'

This merges the new design in master branch, Few things

- free from kdelibs4support
- requires clean rebuild and install dir
- filesystemsearch mediasource will not compile for now (fix coming in
  next commits)

For feedback https://forum.kde.org/viewtopic.php?f=285&t=121705

CCMAIL: plasma-devel@kde.org