v7.7.2 is released

Bugfixes

• fix(draw_triangle): fix polygon/triangle drawing when the order of points is counter-clockwise
• fix(btnmatrix): fix setting the same map with modified pointers
• fix(arc) fix and improve arc dragging
• label: Repair calculate back dot character logical error which cause infinite loop.
• fix(theme_material): remove the bottom border from tabview header
• fix(imgbtn) guess a the closest availabe state with valid src
• fix(spinbox) update cursor position in lv_spinbox_set_step