IBX-10163: Document integrated help (#378)

* IBX-10163: Document integrated help

* Implement reviewer comments

* Add LTS update badge

* Add a link connecting the two articles

* Update screenshots

* Help center is disabled by default in the settings

---------

Co-authored-by: Marek Nocoń <[email protected]>

Author: dabrt

docs/getting_started/discover_ui.md

@@ -144,3 +144,30 @@ Focus mode is enabled by default when you first log into [[= product_name =]], b
 - in the drop-down menu on the right side of the top bar
 
 ![Focus mode switch](img/FM_switch.png "Focus mode switch")
+
+## Help center [[% include 'snippets/lts-update_badge.md' %]]
+
+If the Integrated help [LTS update]([[= developer_doc =]]/ibexa_products/editions/#lts-updates) has been installed in your application, you may notice that the ![Help center](about-info.png){.inline-image} icon appears at the bottom right of multiple screens.
+Click it to access documentation, trainings, and other relevant resources straight from the back office.
+Help center is also [another place]([[= developer_doc =]]/administration/admin_panel/system_information_admin_panel/) where you can check the [[= product_name =]] version that you're on.
+
+![Help center](img/help_center.png "Help center")
+
+Contents of the help center are contextual: 
+
+- If you are an [editor](editor.md) or [store manager](shop_manager.md) working in a production environment, help center contains links to user documentation, release notes and product roadmap highlights.
+- If you are a developer whose task is to set up or extend the application, it additionally shows links to developer documentation, API references and the GraphQL console.
+
+Help center can be [customized]([[= developer_doc =]]/administration/back_office/customize_integrated_help/) to fit the needs of your organization, for example, to include links to your internal style guides.
+
+### Enable help center
+
+Help center is disabled by default, but you can toggle it in [user settings](get_started.md#browsing).
+
+### Dismiss help icon
+
+It may happen that the help icon overlaps with other interface elements that you want to interact with.
+In such case, hover over the help icon and click the X icon to dismiss it.
+The help icon reappears when you reload the screen.
+
+![Help obstructs UI](img/help_obstructs.png "Help obstructs UI")

docs/getting_started/get_started.md

@@ -90,7 +90,7 @@ You can access your user settings on the right side of the top bar:
 
 Here you can [change your user password](get_started.md#change-the-password) and define your user preferences, such as preferred timezone, short and full date, and time format, or back office language.
 
-**Location**
+#### Location
 
 |Setting|Description|
 --------|-----------|
@@ -101,29 +101,30 @@ Here you can [change your user password](get_started.md#change-the-password) and
 |Full date and time format|Sets full date and time format used in the back office.|
 |Language|Sets the default language used in the back office.|
 
-**Content authoring**
+#### Content authoring
 
 |Setting|Description|
 --------|-----------|
 |[Autosave draft every given period](content_versions.md#autosave)|Enables or disables autosaving drafts.|
 |Seconds till next draft autosave|Sets time period for next autosave.|
-|Enable character count in online editor|Enables or disables charactes count.|
+|Enable character count in online editor|Enables or disables character count.|
 |Automatically open block settings in builders|Enables or disables the behavior of blocks used in builders.|
 
-**Browsing**
+#### Browsing
 
 |Setting|Description|
 --------|-----------|
 |Number of items displayed in the table|Sets the number of items displayed in sub-items.|
-|Location preview|Enables or disabled a thumbnail preview on the content tree.|
+|Location preview|Enables or disables a thumbnail preview on the content tree.|
+|Help center|Disables or enables the [help center](discover_ui.md#help-center).  [[% include 'snippets/lts-update_badge.md' %]]|
 
-**Mode**
+#### Mode
 
 |Setting|Description|
 --------|-----------|
 |Focus mode|Enables or disables the [focus mode](discover_ui.md#focus-mode).|
 
-**Dashboard**
+#### Dashboard
 
 |Setting|Description|
 --------|-----------|