Previously OlderThan and NewerThan was configured for day
which has been changed to Days, Hours and minutes.
Also, changed the `flag` in `find` command to be `newer-than` and `older-than` to be consistent with other commands.
- Watch now avoids an unnecessary waitgroup and simplifies overall flow.
- Watch now honors maxDepth parameter as well.
- Parsing logic is fully outside in the mainFind() function.
- Enhance and fix behavior of nameMatch to comply with unix
find behavior.
- Enhance and fix behavior of maxdepth to comply with unix
find behavior.
Fixes#2272
