Computates the number of hits and misses that would arise,.
when the actual referenceString would have been
processed by the OPT-strategy on the memory allocation
with which also the actual startegy started
Also, the hit-ratio between actual strategy and OPT is recalculated.
Switches between the manual input on keyboard and the automatic input
when a given referenceString is beeing processed
and enables/disables the input field for manual references