Backport #24307Fix#24305
According to MDN, "bold" starts from 700, some fonts do not provide
"bolding" for weight 600
Manually backport, no CSS conflict.
Backport #23523, Close#23517
There is no "dropdown menu" for image/csv view, so we could only add the
"overflow-x: scroll" to the image/csv view.
Co-authored-by: KN4CK3R <admin@oldschoolhack.me>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>