Fix clearing the chart title...
Fix clearing the chart title
Task-number: QTBUG-51725
Change-Id: Idf5c52052f385fb2d07201ac8844415a1b7841ed
Reviewed-by: Tomi Korpipää <tomi.korpipaa@theqtcompany.com>
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@theqtcompany.com>