Grapher XXL stopped working since Zabbix 4.0.0

[olafbuitelaar]

Description

The Grapher plugin stopped working since Zabbix 4.0.0. It appears Zabbix changed the timeline interface, on which the plugin apparently depends.
It's possible to make it render the page again by adding this in the grapher/grapher.js file;
timeControl.timeline = timeControl.objectList.scrollbar.timeline;
after:
timeControl.processObjects();
however this will render the graphs with a default timerange, and refreshes won't work. Also the new timeline control won't be rendered. since the whole _usertime seems to be gone.
I've checked the Zabbix commit log, but couldn't find a clue on what should be changed to make the timeline control functioning again.

Steps to Reproduce

1. upgrade to Zabbix 4.0.0
2. goto the grapher plugin
3. it won't render

[jangaraj]

Thank for the report. The best option will be to fix it in the main project https://github.com/sepich/zabbixGrapher/issues
Could you open pull request, please?