Revert "[Issue] Text is overwrapped by other text."

This reverts commit 6ea21f3d8d9b0a558861d7ffc7227af549b46f0b.
[Issue] Text is overwrapped by other text.
[Cause] Two instances of EditText share the same variable name.
[Fix] Modified DisplayListActor#hookVariable/unhookVariable() so that actors can register functions with the same name.