Doc: Describe newly supported Qt Quick Controls 2

Support for several controls has been added to the Library in the
Design mode.

Change-Id: I9822f7379991eea3b32f47574e3c3548445d538d
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

doc/src/qtquick/qtquick-components.qdoc

@@ -116,6 +116,13 @@
         \li \l{ListView}{List View} provides a list vizualization of a model.
         \li \l{PathView}{Path View} visualizes the contents of a model along a
             path.
+        \li \l [QtQuickControls2] {ScrollView}{Scroll View} provides scrolling
+            for user-defined content. It can be used instead of a \l Flickable
+            item.
+        \li \l [QtQuickControls2] {StackView}{Stack View} provides a stack-based
+            navigation model.
+        \li \l[QtQuickControls2] {SwipeView}{Swipe View} enables users to
+            navigate pages by swiping sideways.
     \endlist
 
     When you add a \l{GridView}{Grid View}, \l{ListView}{List View}, or
@@ -124,7 +131,9 @@
     You can edit item properties in the \uicontrol Properties pane or
     in the \uicontrol {Text Editor}. You can also replace the default model and
     delegate with other, more complex models and delegates in the
-    \uicontrol {Text Editor}.
+    \uicontrol {Text Editor}. \l{ItemDelegate}{Item Delegate} and
+    \l{SwipeDelegate}{Swipe Delegate} delegate components are also available
+    in the \uicontrol Library.
 
     \section1 Positioning Items on Screens
 
@@ -332,6 +341,8 @@
             logical group of controls together, within a titled visual frame.
         \li \l [QtQuickControls2]{Label} is a text label with inherited styling
             and font.
+        \li \l [QtQuickControls2]{Page} provides a styled page control with
+            support for a header and footer.
         \li \l [QtQuickControls2]{PageIndicator}{Page Indicator} indicates the
             currently active page.
         \li \l [QtQuickControls2]{Pane} provides a background matching with the
@@ -367,16 +378,20 @@
             item delegate that can be toggled on (checked) or off (unchecked).
         \li \l [QtQuickControls2]{ComboBox}{Combo Box} is a combined button and
             popup list that is populated by using a data model.
+        \li \l [QtQuickControls2]{DelayButton}{Delay Button} provides an option
+            button that is triggered when held down long enough.
         \li \l [QtQuickControls2]{Dial} is a circular dial that is rotated to
             set a value.
-        \li \l [QtQuickControls2]{ItemDelegate}{Item Delegate} is a standard
-            view item that can be used in various views and controls.
         \li \l [QtQuickControls2]{ProgressBar}{Progress Bar} indicates the
             progress of an operation.
         \li \l [QtQuickControls2]{RadioButton}{Radio Button} provides an option
             button that can be switched on (checked) or off (unchecked).
         \li \l [QtQuickControls2]{RadioDelegate}{Radio Delegate} presents an
             item delegate that can be toggled on (checked) or off (unchecked).
+        \li \l [QtQuickControls2]{RangeSlider}{Range Slider} enables users to
+            select a range of values by sliding two handles along a track.
+        \li \l [QtQuickControls2]{RoundButton}{Round Button} provides a push
+            button with rounded corners that you can associate with an action.
         \li \l [QtQuickControls2]{Slider} selects a value by sliding a handle
             along a track.
         \li \l [QtQuickControls2]{SpinBox}{Spin Box} enables the user to specify
@@ -384,6 +399,13 @@
             on the keyboard, or by entering a value in the box.
         \li \l [QtQuickControls2]{Switch} is an option button that can be
             toggled on or off.
+        \li \l [QtQuickControls2]{SwitchDelegate}{SwitchDelegate} presents an
+            item delegate with a switch indicator that can be toggled on or off.
+        \li \l [QtQuickControls2] {TabBar}{Tab Bar} enables users to switch
+            between different views or subtasks.
+        \li \l [QtQuickControls2]{TabButton}{Tab Button} is a button
+            that is functionally similar to \uicontrol Button, but provides a
+            look that is more suitable for a \uicontrol {Tab Bar}.
         \li \l [QtQuickControls2]{TextArea}{Text Area} displays multiple lines
             of editable formatted text.
         \li \l [QtQuickControls2]{TextField}{Text Field} displays a single line
@@ -394,6 +416,8 @@
         \li \l [QtQuickControls2]{ToolButton}{Tool Button} is a button
             that is functionally similar to \uicontrol Button, but provides a
             look that is more suitable for a \uicontrol {Tool Bar}.
+        \li \l [QtQuickControls2]{ToolSeparator}{Tool Separator} separates a
+            group of items from adjacent items on a \uicontrol {Tool Bar}.
         \li \l [QtQuickControls2]{Tumbler} is a spinnable wheel of items that
             can be selected.
     \endlist