KeySequenceItem: change `keySequence` to var
Being an alias it causes problems such as https://bugs.kde.org/show_bug.cgi?id=462100.
I only tested this in Haruna and in the test app.
Being an alias it causes problems such as https://bugs.kde.org/show_bug.cgi?id=462100.
I only tested this in Haruna and in the test app.