Fix tst_textedit.qml

On platforms that have QT_NO_CLIPBOARD defined copy/paste/cut functions
are not available.

Change-Id: Ia2c82d0d3910f89642b1c3ef719caee88da3999e
Reviewed-by: Damian Jansen <damian.jansen@gmail.com>
Reviewed-by: Fabian Bumberger <fbumberger@rim.com>
Fix some typos in usage string.

Fix some spelling errors in the command usage string.

Change-Id: Iee94987d0a3dff78e39f588b4c21415ed40a514c
Reviewed-by: Alan Alpert <aalpert@blackberry.com>
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>