This reverts commit 1e859eb137.
We will use atool on OS X as well, it can be brewed easily.

...because you need to know where you are.

* Prevent nnn from waiting on open file process

* Add env var flag to not wait for child process when opening file

* Set nowait flag once to skip bit-or every time we open a file

* Add documentation for NNN_NOWAIT

Fix regression from 1e5a0b8c5b.

Check if the number of columns needed to print name exceeds the number of cols.
If it does, split the name str at the max number of columns available for name.
Conversion to wide char ensures the split is done at a valid codepoint.

The current patch adds some optimization as well:

- No more copying to an intermediate (global) string.
- If the name is shortened, escape chars are replaced only till the terminator.