query-selectable selectors are not necessarily sheet-selectable

Related commits:
- 4f923384de
- 97a33c9572
- ef07171f5a

For instance, with "Experimental Web Platform features" enabled, the
following filter becomes natively query-selectable:

    .fail:has(+ a > b)

Meaning uBO won't need to emulate the `:has()` operator, it will
be executed natively using `querySelectorAll()`.

This commit fixes the erroneous assumption that a query-selectable
is also sheet-selectable.

src/js/static-filtering-parser.js

@@ -1404,9 +1404,12 @@ Parser.prototype.SelectorCompiler = class {
         const compiled = this.compileProceduralSelector(raw);
         if ( compiled === undefined ) { return false; }
 
-        out.compiled = compiled.selector !== compiled.raw
-            ? JSON.stringify(compiled)
-            : compiled.selector;
+        out.compiled =
+            compiled.selector !== compiled.raw ||
+            this.sheetSelectable(compiled.selector) === false
+                ? JSON.stringify(compiled)
+                : compiled.selector;
+
         return true;
     }