Issues in firmware r13441

[wangchong01]

Hello,
I've found several issues in the latest firmware.
1. The BLIT_P function will do alpha mix when the target area is not the same as the source area, however, the color is directly copied to the target when it's the same even if alpha is set.
2. The PIXON_P function will do alpha mix but in the manual the PIXON_P function is described as "set the pixel".
3. When a GROB is displayed in Home View, it will have an white background when either the width or the height of the GROB is larger than 128, whatever the theme is that. (I suppose its background should be black when I use a dark theme.)
4.The INPUT function won't accept any inputs except you directly press Enter when inputting when a string is put in the variant.
5.The AFilesB function will crash when you request to read out of the file, i.e. AFiles("1"):=1;AFilesB("1",100);.
6.The color set dialog doesn't show a correct color when the saturation of the color is not 128, i.e F1(COLOR):=#C0C0C0h.