D15464: [server] Touch drag support

[Roman Gilg]

romangg added a dependent revision: D15466: Add Wayland touch drag and drop 
support.

REPOSITORY
  R127 KWayland

REVISION DETAIL
  https://phabricator.kde.org/D15464

To: romangg, #kwin, #frameworks
Cc: kde-frameworks-devel, michaelh, ngraham, bruns