Fixes: NB#176028, Ut_MKeyboardHost::testRotatePoint crash
Fixes: NB#176028, Ut_MKeyboardHost::testRotatePoint crash

RevBy: Pekka Vuorela
Details: Style was deleted by vkbWidget before Symbol view was
automatically deleted. Now we explicitly delete it.

KDE/plasma-maliit-plugins,maliit/plugins,RHawkeyed/plugins,develersrl/maliit-demo-qml,RHawkeyed/plugins,develersrl/maliit-demo-qml,maliit/plugins,maliit/plugins,RHawkeyed/plugins,develersrl/maliit-demo-qml,RHawkeyed/plugins,KDE/plasma-maliit-plugins,RHawkeyed/plugins,develersrl/maliit-demo-qml,KDE/plasma-maliit-plugins,maliit/plugins,KDE/plasma-maliit-plugins