Add docs and update screenshot

doc/user/project/issue_board.md

@@ -173,10 +173,14 @@ or in situations where a repository is used to host the code of multiple
 products.
 
 Clicking on the current board name in the upper left corner will reveal a
-menu from where you can create another Issue Board and rename or delete the
-existing one.
+menu from where you can create another Issue Board or delete the existing one.
 Using the search box at the top of the menu, you can filter the listed boards.
 
+When you have 10 or more boards available, a "Recent" section is also shown in the menu.
+These are shortcuts to your last 5 visited boards.
+
+![Multiple Issue Boards](img/issue_boards_multiple.png)
+
 When you're revisiting an issue board in a project or group with multiple boards,
 GitLab will automatically load the last board you visited.
 
@@ -184,8 +188,6 @@ NOTE: **Note:**
 The Multiple Issue Boards feature is available for
 **projects in GitLab Starter Edition** and for **groups in GitLab Premium Edition**.
 
-![Multiple Issue Boards](img/issue_boards_multiple.png)
-
 ### Configurable Issue Boards **[STARTER]**
 
 > Introduced in [GitLab Starter Edition 10.2](https://about.gitlab.com/2017/11/22/gitlab-10-2-released/#issue-boards-configuration).