Drop an un-pinned repository from the scan's code section at once

Un-pinning a repository from a site left no clear sign it worked: the saved
message sits at the top of the page while the code section is further down, and
that section still listed the repository because it was read from the scan's
stored matches.  The code section now checks the current link, so a repository
un-pinned since the scan drops straight out of the linked list and the un-pin
prompt.  Seeing it gone is the plain sign the un-pin took.

Author: hackrange

app/core/external.py

@@ -3036,6 +3036,11 @@ def code_behind(db, user, scan: ExternalDastScan, asset: ExternalAsset) -> dict:
         if rid not in visible:
             continue
         link = links.get(rid) or {}
+        # A repository un-pinned since the scan is no longer linked, so it drops
+        # out of here at once: the code section then shows straight away that it
+        # is gone, which is the plain sign that the un-pin took.
+        if not link.get("linked"):
+            continue
         src = link.get("source") or ""
         total = int(l.get("routes_total") or 0)
         reached = int(l.get("routes_reached") or 0)