Currently, graph view display the blank chart when the sample data is set and the noContentHelp message is empty. so in this commit, graph view display the sample data with noContentHelp message even if the noContentHelp message is empty. TaskID-2347554 closes odoo/odoo#62153 Related: odoo/enterprise#14840 Signed-off-by: Lucas Perais (lpe) <lpe@odoo.com>