[kwin]

Following this checklist to help us incorporate your
contribution quickly and easily:

• Make sure there is a JIRA issue filed
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  require a JIRA issue. Your pull request should address just this issue, without
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• Each commit in the pull request should have a meaningful subject line and body.
• Format the pull request title like [MENFORCER-XXX] - Fixes bug in ApproximateQuantiles,
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[slawekjaranowski]

Here we have many similar separate rules, some computation can be skipped ... but can be done in separate PR.

Now I discover it ... 😄

[jira-importer]

Resolve #874

[jira-importer]

Resolve #874