gui: the declared type of argument `master` is now `OWWidget or OWComponent`
OWScatteplotGraph: Changing colors no longer updates the entire graph
Pulled jitter_continuous to ScaleData
Scatter Plot: Changing shape and labels no longer updates entire graph
Scatter Plot: Changing sizes no longer updates entire graph
ScatterPlotGraph: constructor cleaning
Merge remote-tracking branch 'origin/master'