Fix jQuery #13499: leading ID matching only a name
No ticket: small size reduction
No ticket: polyfill push.apply(_, NodeList) for Android
No ticket: document affected versions for support workarounds
No ticket: micro-optimize support flags
Fix jQuery #13505: Separate unstable sort and compareDocumentPosition workarounds
No ticket: Support micro-optimizations
No ticket: Fix typos. Close gh-192.