Add lv_<widget>_draw_part_type_t to widgets to precisly describe the hooked drawings.
Also add class_p element to lv_obj_draw_part_dsc_t to show what widgets lv_<widget>_draw_part_type_t needs to be used.
Related to: https://forum.lvgl.io/t/how-to-add-minor-division-lines-to-a-chart/5366/
* Spinbox set cursor to specific position (funct.)
* changed exp10 to lv_pow(10
* Update lv_spinbox.c
resolved indentation
* Update spinbox.md
Added lv_spinbox_set_pos description
Co-authored-by: Sebastian Dyker <sebastian.dyker@walther-systemtechnik.com>