fix remove target button position same with query
Fix to fetch nested field as:
 1. direct key access if exists
 2. stringified key acccess if key is specified as "hash.0" (not "$0" and "$$0")
 3. check all keys in hash with escaped name

3. is for keys w/ chars that should be escaped, like '/' or ' ' and so on.
This is very heavy fetch process, so user should escape keys before 'event send'.