Support wrapping of long column values in plain view

Add an option so we can switch on / off auto wrapping of long columns in the plain view. The default behavior will not wrap any column contents, so the output easily gets hard to read, especially on a small-sized terminal.

The option should wrap cell contents individually, and render cell walls on every device line. E.g.

+----------+------------+
+ foo + bar +
+ foo2 + a very long+
+ + value +
+ foo3 + xxx +
+----------+------------+