FX 2.45 build 17

FX 2.45 build 17 is the twelfth build for C.Basic FX 2.45, released on April 24, 2020.

Fixes

 * Fixed the bug that the matrix display of CPLX was too slow. and changed it from a three-column display to a four-column display.
 * Fixed the bug that caused the ? command input to be in alpha mode at the start of the program. (build16 en-bug)
 * Fixed the bug in the initialization of hidden memory.