Improved fake scrollbar behavior

Improved fake scrollbar:

• No show of fake scrollbar when scrolling area is the same size of the picker.
• Improved position accuracy when showing only a few filter results.

1.2.9 - Bugfixes - Diversities

Allow displaying and choosing diversities from within the dedicated diversity picker, or after clicking on the skin tone picker.

Multiple picker performance boosts

Improved overall picker performance by:

• Reducing on-scroll re-renders to the minimum required.
• Reducing DOM and classname iterations.
• Removing unneeded category position re-calculation.