KTouch interface strings

[Claus Christensen]

Translating the interface strings for KTouch I came across this (message 
88, src/models/lessonmodel.cpp:84):

    <p>New characters: %1<p/><p>%2</p>

which should be

    <p>New characters: %1</p><p>%2</p>

Also, message 121 (src/qml/ScoreScreen.qml:191) says simply "On:". It is 
not easy to translate prepositions without context - does this refer to 
a switch or...?

Similar problem with msg 134 (src/qml/ScoreScreen.qml:419): "Over"