Tidyup: moved some replay globals out of header, renaming some others

Global items renamed (and moved from middle of .cpp file to top, only used
within class file):
QAction * actionSpeedDisplay    ==> pActionSpeedDisplay
QAction * actionReplayTime      ==> pActionReplayTime
QLabel * replaySpeedDisplay     ==> pReplaySpeedDisplay
QLabel * replayTime             ==> pReplayTime
QTimer * replayTimer            ==> pReplayTimer
QToolBar * replayToolBar        ==> pReplayToolBar

Global items moved out of class header (as not used outside of class files):
QAction * actionReplaySpeedUp   ==> pActionReplaySpeedUp
QAction * actionReplaySpeedDown ==> pActionReplaySpeedDown

Signed-off-by: Stephen Lyons <slysven@virginmedia.com>
These lines set the timer up as soon as practicable but does NOT start it, so that we can then go and put up the display THEN we start the timer going, it may only be a trifling amount in the order of doing things but as a principle that a current Supermarket chain (who are in the news in the UK at the moment) espouses "every little helps"!