* add NonDeleted
* make test:all script run tests without prompt
* rename helper
* replace with helper
* make element contructors return nonDeleted elements
* cache filtered elements where appliacable for better perf
* rename manager element getter
* remove unnecessary assertion
* fix test
* make element types in resizeElement into nonDeleted
Co-authored-by: dwelle <luzar.david@gmail.com>
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