Retire support for Internet Explorer in Service Pulse

Hi, all!

Microsoft is winding down their support for Internet Explorer 11, and our policy(https://docs.particular.net/servicepulse/installation) has always been to support the browser versions the creators still recommend in ServicePulse. Microsoft Edge, Chrome, Firefox, and Safari is the updated list of supported browsers. ServicePulse will probably still work in Internet Explorer for a long time, but we will not commit to fixing IE specific issues anymore.

Regards,
Jan Ove Skogheim
Particular Software