RPS discrete time initial strategy display

[developer]

From Tim Cason:

In the first subperiod a random initial strategy is shown on the (correctly all-blank) simplex, but apparently if the subject clicks to choose a different strategy that new “target” does not display until the initial subperiod closes. (I didn’t check carefully to see whether a chosen initial subperiod strategy is implemented or not.) In the other subperiods, however, the target immediately shifts (as we want) when the subject clicks on another strategy.

[developer]

Solution: During subperiod 1 (before it ends), don't show current strategy marker, only show target. Also shouldn't show opponent strat. marker, which works correctly, so related issues.