Revert "remove broken functions from convert module"
Revert "remove broken functions from convert module"

Because I forgot that the /render/ page was still using vdom

This reverts commit 93fb944e1ff7802f1970bcad3cd3ca149a23cdf3.

yflory/cryptpad,yflory/cryptpad,xwiki-labs/cryptpad,yflory/cryptpad,xwiki-labs/cryptpad,xwiki-labs/cryptpad