IE11: No arrows are displayed in tree view

[AlexanderPoleschuk]

I'm submitting a ...

• bug report
• feature request
• support request => Please do not submit support request here, see note at the top of this template.

What is the current behavior?

No arrows are displayed in Categories/Suites and other tabs in tree view

If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem

Open the report in IE11 and navigate to any tab with tree view

What is the expected behavior?

What is the motivation / use case for changing the behavior?

Please tell us about your environment:

Allure version	2.3
Test framework	testng@6.10
Allure adaptor	allure-testng@2.0-BETA15
Generate report using	allure-maven@2.18

Other information