Werk #11794: Improved support for IE11

Component	User interface
Title	Improved support for IE11
Date	Mar 25, 2021
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.1.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 2.0.0p2 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

The support for Internet Explorer 11 is improved:

• The host overview dashboard element is now working correctly
• Hexagons in the host and service statistics are now rendered correctly
• Graphs no longer have a black area

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