Doc: Describe Context Menu Commands in Library

Fixes: QDS-4061
Change-Id: I4f19450cd03f7f2da7e9064a1bf8519e4ccfc3c4
Reviewed-by: Miina Puuronen <miina.puuronen@qt.io>
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>

doc/qtcreator/src/qtquick/qtquick-library.qdoc

@@ -41,9 +41,10 @@
     \image qtquick-components-tab.png "Library view Components tab"
 
     \uicontrol Components displays modules that have been added to your project.
-    The modules contain visual components, such as basic shapes, UI controls,
-    and 3D components, and add functionality to the project. All components have
-    a type.
+    In many modules the components have been further organized into different
+    categories. The modules contain visual components, such as basic shapes,
+    UI controls, and 3D components, and add functionality to the project.
+    All components have a type.
 
     The UI controls can be styled to have the look and feel of a particular
     operating system, such as \macOS, Windows, Android, or iOS.
@@ -110,4 +111,24 @@
     or \uicontrol {Form Editor}, components with a suitable type are
     automatically created for you. For example, components of the
     \l{Images}{Image} type will be created for graphics files.
+
+    \section1 Context Menu Commands
+
+    \image qtquick-library-context-menu.png "Context menu commands in Library"
+    \image qtquick-library-context-menu-hide.png "Context menu command Hide Category"
+
+    To use the context menu commands in Library, right-click on the name of
+    a module or category and select one of the following commands:
+
+    \list
+        \li \uicontrol {Remove Module}: removes the component module added to
+            \uicontrol Library.
+        \li \uicontrol {Expand All}: expands all the modules.
+        \li \uicontrol {Collapse All}: collapses all the modules.
+        \li \uicontrol {Hide Category}: hides the category from the module.
+        \li \uicontrol {Show Module Hidden Categories}: shows the hidden
+            categories of the module.
+        \li \uicontrol {Show All Hidden Categories}: shows the hidden
+            categories in all of the modules.
+    \endlist
 */