New Counter behavior, fixes

• Bug fix for online users counter
• Fixed Logisim not reopening all files after a restart (ex. after an update)
• Fixed some translation
• New Counter behavior, now easier to understand, with possibility to continue using the old one
  Truth table:
  RCNT LD
  0 0 up count
  0 1 load
  1 0 down count
  1 1 load
  X X up count
  X 0 up count
  X 1 load
  0 X up count
  1 X down count
  EN = 0 --> no count