Update changelog and release notes

Signed-off-by: Roberto Rosario <roberto.rosario@mayan-edms.com>

HISTORY.rst

@@ -6,6 +6,16 @@
 * Fix IMAP4 mailbox.store flags argument. Python's documentation
   incorrectly state it is named flag_list. Closes GitLab issue
   #606. 
+* Improve the workflow preview generation. Use polylines
+  instead of splines. Add state actions to the preview.
+  Highlight the initial state.
+* Add help text to the workflow transition form comment field.
+* Fix direct deployment instructions.
+* Add user, group, and role dashboard widgets.
+* Add test mixin detect database connection leaks.
+* Remove tag create event registration from the tag
+  instances. The tag create event is not applicable to
+  existing tags.
 
 3.2.3 (2019-06-21)
 ==================

docs/releases/3.2.4.rst

@@ -14,6 +14,22 @@ Changes
   incorrectly state it is named flag_list. Closes GitLab issue
   #606. Thanks to Samuel Aebi (@samuelaebi) for the report and 
   debug information.
+- Support configurable GUnicorn timeouts. Defaults to 
+  current value of 120 seconds.
+- Fix help text of the platformtemplate command.
+- Fix IMAP4 mailbox.store flags argument. Python's documentation
+  incorrectly state it is named flag_list. Closes GitLab issue
+  #606. 
+- Improve the workflow preview generation. Use polylines
+  instead of splines. Add state actions to the preview.
+  Highlight the initial state.
+- Add help text to the workflow transition form comment field.
+- Fix direct deployment instructions.
+- Add user, group, and role dashboard widgets.
+- Add test mixin detect database connection leaks.
+- Remove tag create event registration from the tag
+  instances. The tag create event is not applicable to
+  existing tags.
 
 Removals
 --------