Split up chart-options-selector.tsx file

[bprusinowski]

Currently, the chart-options-selector.tsx file is over 2000 lines long and contains a lot of components, which makes it less convenient to jump top-down instead of files when making changes. To make development and code maintenance easier, we should split the file up into smaller files, and maybe create a chart-options-selector folder to contain them.

[sosiology]

@bprusinowski I planned this in for maintenance (a) quarterly next year