Squashed 'extensions/WikiEditor/' content from commit 94ac214

git-subtree-dir: extensions/WikiEditor
git-subtree-split: 94ac214975c2f16086d313fb73492f72f887f5da
Merge commit 'd41ffc9dd69ac638fc334c87660f5aed22d67fb0' as 'extensions/WikiEditor'
Enable WikiEditor