fix(scale): fix the issue of needle sliding in scale

[lhdjply]

Description of the feature or fix

@liamHowatt @C47D

#6320 fixed the sliding issue of lv_example_scale_3(). But I found that in lv_demo_widgets(), this issue still occurs when the window is maximized first and then zoomed out (see video below).Therefore, it is best to integrate directly into lv_scale_set_image needle_value

416137c29d72090dac256463069cb9c7.mp4

Notes

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[liamHowatt]

💯 nice!

I wonder if it belongs in the constructor? Other widgets remove/add flags in their constructors. What do you think?

Examples: roller, button

[lhdjply]

I wonder if it belongs in the constructor? Other widgets remove/add flags in their constructors. What do you think?

This way of modification is indeed better. Done.

[kisvegabor]

👍

[liamHowatt]

Thanks!