added more examples of passing parameters in control macro

I never can remember how to use control macro with multiple parameters properly so i made few tests and added results to the doc.
Protoze uz tam je `{control cartControl, $maxItems, $showSummary}`, tak mi prislo zbytecny tam nechavat s jednim parametrem, kdyz vis, jak se zadavaj dva parametry, tak jeden si snadno odvodis.