Add: (ement-room-list--side-window-after-initial-sync)

An alternative to `ement-room-list--after-initial-sync' for use in
`ement-after-initial-sync-hook'.

Also autoload `ement-room-list-side-window' (like `ement-room-list').

ement-room-list.el

@@ -583,7 +583,8 @@ from recent to non-recent for rooms updated in the past hour."
 ;;;###autoload
 (defun ement-room-list--after-initial-sync (&rest _ignore)
   "Call `ement-room-list', ignoring arguments.
-To be called from `ement-after-initial-sync-hook'."
+To be called from `ement-after-initial-sync-hook'.
+See also `ement-room-list--side-window-after-initial-sync'."
   (ement-room-list))
 
 ;;;###autoload
@@ -757,6 +758,14 @@ DISPLAY-BUFFER-ACTION is nil, the buffer is not displayed."
         ;; must be set as the current buffer, so we have to do this explicitly here.
         (set-buffer buffer-name)))))
 
+;;;###autoload
+(defun ement-room-list--side-window-after-initial-sync (&rest _ignore)
+  "Call `ement-room-list-side-window' ignoring arguments.
+To be called from `ement-after-initial-sync-hook'.
+See also `ement-room-list--after-initial-sync'."
+  (ement-room-list-side-window))
+
+;;;###autoload
 (cl-defun ement-room-list-side-window (&key (side 'left))
   "Show room list in side window on SIDE.
 Interactively, with prefix, show on right side; otherwise, on