Commit 8ec177ed authored by Martin Heistermann's avatar Martin Heistermann

ResourceManager: implement move semantics, simplify logic

Simplify property destruction logic and do not keep non-persistent props
around in clearVec(). If a prop is alive but non-persistent, someone
else has a shared_ptr to it, so we will not pull out the rug from under
their feet.
parent 93ed0e80
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