Describe the bug
Tooltip style issue

To Reproduce
Steps to reproduce the behavior:

1. Go to any chart with a legend in IE11
2. Notice the misformed tooltip like below

Expected behavior
The tooltip should look the same in IE11 as it does in Chrome

Screenshots

Version (please complete the following information):

• OS: Win7
• Browser: IE11
• Elastic Charts: 9.x

Checklist

• every related Kibana issue is listed under Kibana Cross Issues list
• kibana cross issue tag is associated to the issue if any kibana cross issue is present