Feature Request: Support lists for selector interpolation

[SLaks]

If I interpolate a list variable in a selector, can you expand it into multiple selectors when nesting?

For example:

Source

@tags: a, b, code, dd;

@{tags} {
  &:hover {
   color: red; 
  }
}

Current Output

a, b, code, dd:hover {
  color: red;
}

Desired Output

a:hover, b:hover, code:hover, dd:hover {
  color: red;
}

[seven-phases-max]

See #1421 (also #1694 and other issues linked there).

[seven-phases-max]

Closing as duplicate of #1421.