1. Support adjustment of cursor result display position.
2. Support displaying the average sampling count in the lower right corner of the screen.
3. Support knob acceleration function for cursor value and derivative step.
4. Support setting Math vertical offset and derivative step through the keypad.
5. Optimize trace colors after screen invert (C1 as yellow, C2 as green).
6. Fixed several bugs：
a) Issue where channel invert setting is not saved after reboot..
b) Issue with universal knob indicator light status error.
c) Issue when the menu is hidden, opening History or Search does not show the menu.
d) Issue when measure gate at the screen boundary, the device cannot be powered on after reboot.
e) Issue of missing prompt when adjusting parameters with knob in FFT split-screen mode.
f) Issue where reference label was displayed incorrectly when obscured by menu.
g) Issue of inaccurate AC measurement when inputting large offset AC signal.
