FX 2.44 build 16

FX 2.44 build 16 is the second build for C.Basic FX 2.44 and technically the first build for C.Basic FX 2.45, released on February 10, 2020.

Additions

 * Added the strings sort of SortA/SortD command.
 * Added more functions to the FKeyMenu command.
 * FKeyMenu([~],"string"/ [,C/M/m/N/R/I/S/L] )
 * C: clear the icon.
 * M: mask the whole icon.
 * m: mask only the frame of icon.
 * N: default white icon.
 * R: black icon with notch at the bottom right.
 * I: black icon with no notch at the bottom right.
 * S: white box icon.
 * L: expand the "string" display area by 2 dots left.
 * The order of the 3rd argument is arbitrary.
 * Added sample program of FKeyMenu command by Krtyski & CalcLoverHK & Colon (C.Basic_sample\FKeyMenu_sample)
 * Added emulator judgement System(-7) command.
 * Return 0 and 1 if this command is run on the real calculator and emulator respectively.

Changes

 * Updated manuals.
 * Improved the matrix list screen that newly supported the display of extended area Mat/List/Vct after 53.
 * [←]:backword
 * [→]:forward
 * Changed to display the size of the free area in the status line when [SHIFT] is pressed in the editor.
 * Improved variables page independently for INT%, DBL# and CPLX.

Fixes

 * Fixed the bug in DBL# mode where pauses and imaginary numbers were displayed in variables page.