When filter with "data-or" is used, sorting goes wrong

I have the same issue as MarcelMPunkt pointed out in Issue #10

See his https://github.com/1rosehip/jplist-es6/issues/10#issuecomment-464040628

Review issue #10 and the linked comment to understand the bug with 'data-or' filtering affecting sorting. Examine the jplist-es6 source code, particularly the filtering and sorting logic. Look for test files related to filtering and sorting to understand expected behavior. Determine how the 'data-or' attribute interacts with sorting algorithms.

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