Unlock selectors on discovery

[theKashey]

Currently, any selector will be inlined when the last part of it is found, however we can accept only those ones, which first part was found before as well

.dark-theme .header
⬇️
<div class='header'>does nothing</div>

<div class="dark-theme"> "unlocks .dark-theme"
 <div class='header'>uses style</div> 

[theKashey]

The idea is around the sequential nature of nested selectors:

// `dark-theme` is introduced first
<div class="dark-theme"> "unlocks .dark-theme"
// dependent selectors are always follow
  <div class='header'>uses style</div> 

This allows embedding a check into usedFilter - a function before preventing duplication of selectors.

• before: if selector has been introduced - skip
• now: and if parent part of a selector has NOT been introduced - skip

It does not handle proper gating, and absolutely ignores DOM structure. But it does the job