[wayland] Send VirtualDesktop::done after editing a property

Summary:
The protocol is double buffered, after changing the name done should be
sent so that clients update.

Test Plan:
Changed a VD name on wayland
Pager tooltip updated

Reviewers: #kwin, zzag

Reviewed By: #kwin, zzag

Subscribers: zzag, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D18513

virtualdesktops.cpp

@@ -67,6 +67,7 @@ void VirtualDesktopManager::setVirtualDesktopManagement(KWayland::Server::Plasma
         connect(desktop, &VirtualDesktop::nameChanged, pvd,
             [desktop, pvd] {
                 pvd->setName(desktop->name());
+                pvd->sendDone();
             }
         );
         connect(pvd, &PlasmaVirtualDesktopInterface::activateRequested, this,