D16675: [server] Put set surrounding text callback with uint in v0 class

[Roman Gilg]

romangg added a dependent revision: D16676: [server] Put (de-)activate, 
en-/disable callbacks in child classes.

REPOSITORY
  R127 KWayland

REVISION DETAIL
  https://phabricator.kde.org/D16675

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