[FEATURE] Move from 2 sliders to only one for "Preferred Age Range"

[jacopo-degattis]

In the Profile Tab > Search Preferences > Preferred Age Range,
I think it would be nice and easier to use if we have a single slider that can be changed from both left and right sides. This way we can handle the maximum age by sliding from the right side and the minimum age sliding from the left one.

I'll provide an example image down below