Introduce PageIndicator control

src/Makefile.qt.include

@@ -303,6 +303,7 @@ QML_RES_QML = \
   qml/components/StorageOptions.qml \
   qml/controls/ContinueButton.qml \
   qml/controls/Header.qml \
+  qml/controls/PageIndicator.qml \
   qml/controls/OptionButton.qml \
   qml/controls/OptionSwitch.qml \
   qml/controls/ProgressIndicator.qml \

src/qml/bitcoin_qml.qrc

@@ -6,6 +6,7 @@
         <file>components/StorageOptions.qml</file>
         <file>controls/ContinueButton.qml</file>
         <file>controls/Header.qml</file>
+        <file>controls/PageIndicator.qml</file>
         <file>controls/OptionButton.qml</file>
         <file>controls/OptionSwitch.qml</file>
         <file>controls/ProgressIndicator.qml</file>

src/qml/controls/PageIndicator.qml

@@ -0,0 +1,22 @@
+// Copyright (c) 2022 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+import QtQuick 2.15
+import QtQuick.Controls 2.15
+
+PageIndicator {
+    id: root
+    delegate: Rectangle {
+        implicitWidth: 10
+        implicitHeight: 10
+        radius: Math.round(width / 2)
+        color: "white"
+        opacity: index === root.currentIndex ? 0.95 : pressed ? 0.7 : 0.45
+        Behavior on opacity {
+            OpacityAnimator {
+                duration: 100
+            }
+        }
+    }
+}