Add input for number of leaves in SYNCMLCE gui
Add input for number of leaves in SYNCMLCE gui

Add a gui input for the number of leaves in the BEAMnrc synchronized
MLCE multi-leaf collimator. Previously, this input did not exist!

ftessier/EGSnrc,mchamberland/EGSnrc,mchamberland/EGSnrc,MartinMartinov/EGSnrc,MartinMartinov/EGSnrc,nrc-cnrc/EGSnrc,nrc-cnrc/EGSnrc,marenaud/EGSnrc,crcrewso/EGSnrc,mchamberland/EGSnrc,ftessier/EGSnrc,nrc-cnrc/EGSnrc,nrc-cnrc/EGSnrc,mchamberland/EGSnrc,crcrewso/EGSnrc,marenaud/EGSnrc,MartinMartinov/EGSnrc,ftessier/EGSnrc,marenaud/EGSnrc,marenaud/EGSnrc,marenaud/EGSnrc,mchamberland/EGSnrc,ftessier/EGSnrc,MartinMartinov/EGSnrc,nrc-cnrc/EGSnrc,ftessier/EGSnrc,MartinMartinov/EGSnrc,crcrewso/EGSnrc,marenaud/EGSnrc,crcrewso/EGSnrc,mchamberland/EGSnrc,ftessier/EGSnrc,crcrewso/EGSnrc