New: Add another preedit/commit string test case
New: Add another preedit/commit string test case

RevBy: Jon Nordby
Test case covers typing of two words, where preedit needs to be flushed when
commit string is sent off between words.

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