Fix: (org-sidebar-tree-toggle) Toggle tree sidebar off properly

I think I broke this in the previous fix by omitting pre-first-heading
content from the sidebar when it displays the whole buffer, which
caused the comparison of the buffers' point-min to fail.

Fixes #34.  Thanks to Matt Price (@titaniumbones) and @MKB6 for
reporting.

Released as 0.3.2.

README.org

@@ -142,6 +142,11 @@ Display a sidebar for ~org-ql~ ~QUERY~.  Interactively, with prefix, prompt for
 :TOC:      0
 :END:
 
+** 0.3.2
+
+*Fixed*
++  Command =org-sidebar-tree-toggle= didn't always toggle the tree sidebar off.  (Fixes [[https://github.com/alphapapa/org-sidebar/issues/34][#34]].  Thanks to [[https://github.com/titaniumbones][Matt Price]] and [[https://github.com/mkb6][mkb6]] for reporting.)
+
 ** 0.3.1
 
 *Fixed*

org-sidebar.el

@@ -2,7 +2,7 @@
 
 ;; Author: Adam Porter <[email protected]>
 ;; URL: https://github.com/alphapapa/org-sidebar
-;; Version: 0.3.1
+;; Version: 0.3.2
 ;; Package-Requires: ((emacs "26.1") (s "1.10.0") (dash "2.13") (dash-functional "1.2.0") (org "9.0") (org-ql "0.2") (org-super-agenda "1.0"))
 ;; Keywords: hypermedia, outlines, Org, agenda
 
@@ -509,13 +509,15 @@ If it is open and shows the view for the current buffer, delete
 it.  Otherwise, show it for current buffer."
   (interactive)
   (let* ((parent-point-min (point-min))
+	 (parent-point-max (point-max))
          (parent-buffer (or (buffer-base-buffer)
                             (current-buffer)))
          (tree-window (--first (window-parameter it 'org-sidebar-tree-window)
                                (window-at-side-list nil org-sidebar-tree-side))))
     (if (and tree-window
              (with-current-buffer (window-buffer tree-window)
-               (and (eq parent-point-min (point-min))
+               (and (<= parent-point-min (point-min))
+		    (= parent-point-max (point-max))
                     (or (eq parent-buffer (buffer-base-buffer))
                         (eq parent-buffer (current-buffer))))))
         ;; Tree displays current buffer: delete tree window.