QmlDesigner: Add ProgressBar to StudioControls

Change-Id: I2d79e4af008fe7ef66ebbe2bf31813230451ee18
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/StudioControls/ProgressBar.qml

@@ -0,0 +1,54 @@
+/****************************************************************************
+**
+** Copyright (C) 2022 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+import QtQuick
+import QtQuick.Templates as T
+import StudioTheme 1.0 as StudioTheme
+
+T.ProgressBar {
+    id: control
+
+    implicitWidth: Math.max(implicitBackgroundWidth + leftInset + rightInset,
+                            implicitContentWidth + leftPadding + rightPadding)
+    implicitHeight: Math.max(implicitBackgroundHeight + topInset + bottomInset,
+                             implicitContentHeight + topPadding + bottomPadding)
+
+    contentItem: Item {
+       implicitWidth: 200
+       implicitHeight: 6
+
+       Rectangle {
+           width: control.visualPosition * parent.width
+           height: parent.height
+           color: StudioTheme.Values.themeInteraction
+       }
+   }
+
+    background: Rectangle {
+        implicitWidth: 200
+        implicitHeight: 6
+        color: StudioTheme.Values.themeThumbnailLabelBackground
+    }
+}

share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/StudioControls/qmldir

@@ -22,6 +22,7 @@ Menu 1.0 Menu.qml
 MenuItem 1.0 MenuItem.qml
 MenuItemWithIcon 1.0 MenuItemWithIcon.qml
 MenuSeparator 1.0 MenuSeparator.qml
+ProgressBar 1.0 ProgressBar.qml
 RadioButton 1.0 RadioButton.qml
 RealSliderPopup 1.0 RealSliderPopup.qml
 RealSpinBox 1.0 RealSpinBox.qml