Fix updating of Error/Warning trackers counter.

src/gui/transferlistfilterswidget.cpp

@@ -559,6 +559,9 @@ void TrackerFiltersList::trackerSuccess(const QString &hash, const QString &trac
             if (currentRow() == 2)
                 applyFilter(2);
         }
+        else {
+            m_errors.insert(hash, errored);
+        }
     }
 
     if (warned.contains(tracker)) {
@@ -569,6 +572,9 @@ void TrackerFiltersList::trackerSuccess(const QString &hash, const QString &trac
             if (currentRow() == 3)
                 applyFilter(3);
         }
+        else {
+            m_warnings.insert(hash, warned);
+        }
     }
 }