7ca651d182
As described in #95966, replace the `ME_EDGEDRAW` flag with a bit vector in mesh runtime data. Currently the the flag is only ever set to false for the "optimal display" feature of the subdivision surface modifier. When creating an "original" mesh in the main data-base, the flag is always supposed to be true. The bit vector is now created by the modifier only as necessary, and is cleared for topology-changing operations. This fixes incorrect interpolation of the flag as noted in #104376. Generally it isn't possible to interpolate it through topology-changing operations. After this, only the seam status needs to be removed from edges before we can replace them with the generic `int2` type (or something similar) and reduce memory usage by 1/3. Related: -10131a6f62-145839aa42In the future `BM_ELEM_DRAW` could be removed as well. Currently it is used and aliased by other defines in some non-obvious ways though. Pull Request #104417
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