Move symon to spacemacs-modeline layer

doc/DOCUMENTATION.org

@@ -1262,6 +1262,7 @@ Some elements can be dynamically toggled:
 | ~SPC t m M~ | toggle the major mode                                           |
 | ~SPC t m n~ | toggle the cat! (if =colors= layer is declared in your dotfile) |
 | ~SPC t m p~ | toggle the point character position                             |
+| ~SPC t m s~ | toggle system monitor (displayed in the minibuffer)             |
 | ~SPC t m t~ | toggle the time                                                 |
 | ~SPC t m T~ | toggle the mode line itself                                     |
 | ~SPC t m v~ | toggle the version control info                                 |

layers/+spacemacs/spacemacs-modeline/packages.el

@@ -13,6 +13,7 @@
       '(
         fancy-battery
         spaceline
+        symon
         ))
 
 (defun spacemacs-modeline/init-fancy-battery ()
@@ -106,3 +107,14 @@
       ;; Enable spaceline for buffers created before the configuration of
       ;; spaceline
       (spacemacs//set-powerline-for-startup-buffers))))
+
+(defun spacemacs-modeline/init-symon ()
+  (use-package symon
+    :defer t
+    :init
+    (progn
+      (setq symon-delay 0
+            symon-refresh-rate 2)
+      (spacemacs|add-toggle minibuffer-system-monitor
+        :mode symon-mode
+        :evil-leader "tms"))))

layers/+tools/symon/README.org

@@ -1,19 +0,0 @@
-#+TITLE: symon layer
-
-* Table of Contents                                         :TOC_4_gh:noexport:
- - [[#description][Description]]
- - [[#install][Install]]
- - [[#keybindings][Keybindings]]
-
-* Description
-[[https://github.com/zk-phi/symon][Tiny graphical system monitor]] that displays various loads in the MiniBuffer
-when enabled and Emacs is idle. 
-
-* Install
-To use this configuration layer, add it to your =~/.spacemacs= file.
-
-* Keybindings
-
-| Key Binding | Description                      |
-|-------------+----------------------------------|
-| ~SPC t M~   | toggle MiniBuffer system monitor |

layers/+tools/symon/packages.el

@@ -1,20 +0,0 @@
-;;; config.el --- symon Layer Packages File for Spacemacs
-;;
-;; Copyright (c) 2012-2017 Sylvain Benner & Contributors
-;;
-;; Author: Eugene "JAremko" Yaremenko <w3techplayground@gmail.com>
-;; URL: https://github.com/syl20bnr/spacemacs
-;;
-;; This file is not part of GNU Emacs.
-;;
-;;; License: GPLv3
-
-(setq symon-packages '(symon))
-
-(defun symon/init-symon ()
-  (use-package symon
-    :defer t
-    :init
-    (spacemacs|add-toggle minibuffer-system-monitor
-      :mode symon-mode
-      :evil-leader "tM")))