This reverts commit 407b690404.

- press pick plugin key
- navigate away from the plugin directory (to ~, say)
- try to open any file, fails

When we are in run plugin mode, but detect we are in a different
context or a non-plugin directory, just cancel the runplgin mode
and continue as usual.

It also cleans up the plugin run function.

* Implement plugins control of nnn + plugins

* Refactor plugins control code and fix getplugs to recognize hidden files

* Fix bug when going to dir on non-current context from plugin

* Fix some plugins to work on openbsd and freebsd

* Renamings

* Switch to -R flag in cp instead of -r; BSDs complain

* Change braces of function location

* Rewrite plugin creation in README and add new plugins to the table

* Update the fzcd script to include fzy or fzf

* Change plugin name resolve-link-dir -> lncd

* Fixing plugins README table

* Remove some cd plugins but add them as examples to plugins README

* Initial commit of sessions implementation

* Reduce code duplication

* Move load session to program flag -e

* Fix context initialization problem when loading session

* Add pinned directory to session and reduce session file size

* Make load_session print an error if exists and few minor adjustments

* Refactor session's file structure

* Initialize required structures in load_session before loading

* Add load session dynamically, restore last session, and extra fixes

* Fix indentation

* Add sessions documentation to man page

* Update fish completions with sessions and make some improvements

* Move to single keybinding session management and add help info

* ESC when asked to insert session name behaves better

* Add sessions completion for bash

* Remove pinned dir from session and minor code refactors

* Define _XOPEN_SOURCE_EXTENDED on SmartOS

Enables wide ncurses.

* SmartOS has alloca() in alloca.h

* SmartOS does not have sig_t

* dprintf() is not available on SmartOS

So replace its usage with fprintf.

* SmartOS has no d_type

* SmartOS has no CLOCK_MONOTONIC_RAW

* SmartOS has no O_DIRECTORY

* Work around SmartOS not having mime detection

* Missing comma