Korean translation + fixes

This update will bring a lot of fixes all over the place and Korean interface support. 멋진 뉴스!

  • Added Korean user interface
  • Fixed variables with digits
  • Fixed scientific numbers negative power
  • Fixed power function precedence
  • Fixed sqrt and cbrt support
  • Fixed negative variable values
  • Fixed currencies with dollar sign detection
  • Fixed prefix inconsistency with bit/bytes
  • Fixed settings window to be over main window
  • Fixed multiple quotes on same line
  • Fixed New Taiwan dollar detection
  • Fixed celsius formatting
  • Fixed crash on large scientific numbers
  • Fixed crash on large negative values
  • Fixed percentage operation overflow
  • Fixed hotkey crash