Allow other keypresses in LogListWidget

By not emitting the native signal, all other keypresses other than
the copy and select keysequences are ignored. This should reallow
keyboard navigation within LogListWidget objects.

Closes #12172.

src/gui/loglistwidget.cpp

@@ -72,8 +72,8 @@ void LogListWidget::keyPressEvent(QKeyEvent *event)
 {
     if (event->matches(QKeySequence::Copy))
         copySelection();
-    else if (event->matches(QKeySequence::SelectAll))
-        selectAll();
+    else
+        QListWidget::keyPressEvent(event);
 }
 
 void LogListWidget::appendLine(const QString &line, const Log::MsgType &type)