Support LIB_ID queries in searchFootprints too

Fixes https://gitlab.com/kicad/code/kicad/-/issues/18039


(cherry picked from commit fee0028ee9)

Co-authored-by: Jon Evans <jon@craftyjon.com>

pcbnew/pcbexpr_functions.cpp

@@ -234,6 +234,12 @@ static bool searchFootprints( BOARD* aBoard, const wxString& aArg, PCBEXPR_CONTE
             if( aFunc( fp ) )
                 return true;
         }
+        else if( aArg.Contains( ':' )
+                 && fp->GetFPIDAsString().Matches( aArg ) )
+        {
+            if( aFunc( fp ) )
+                return true;
+        }
     }
 
     return false;