Delay displaying the message until return is pressed.
Also contain all printwarn() calls inside browse().

We care about the directory we are going to, so there is no reason
to get locked inside there if the parent is readable.

Often I am waiting for a file to download and be renamed from
.foo.part to .foo.  Forcing a redraw is a simple way to check if
the file has completed downloading.

on OpenBSD: "Other non-zero error codes may be returned in exceptional
situations; see DIAGNOSTICS" regcomp(3).

This reverts commit abd301333d.