Axivion: Start handling total row counts

Include them only for the first fetch of an issue kind to
avoid costly additional access.

Change-Id: Icebbea5635b1f1d266238f99c43426dc22fb19b9
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>

src/plugins/axivion/axivionplugin.cpp

@@ -74,6 +74,8 @@ QString IssueListSearch::toQuery() const
     QString result;
     result.append(QString("?kind=%1&offset=%2&limit=%3").arg(kind).arg(offset).arg(limit));
     // TODO other params
+    if (computeTotalRowCount)
+        result.append("&computeTotalRowCount=true");
     return result;
 }