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in kickoff add support for more mouse wheel actions

scroll on the left arrow (back arrow) strip - move to next or previous folder in the same level (go 1 folder up and stop there if last or 1st folder reached)

hold wheel and drag up down - resize icons (like in okular)

scroll on the outmost frame of kickoff - fade in / out text labels (text faded out calls for 'see it' mode instead of 'search for it'. use of mouse wheel allows changing this setting lightning-quickly to the most convenient value at the moment and is very usable)

scroll on 'search' changes it to 'run'

scroll on the 'user name on computer name' changes the line to display other information (date and time / uname / )