issue: Maximize and then Restore `Select a screen to share` window

GitLab: #634
Change-Id: I4c95622297e52d4b7fb5ea42426353a3b3579186

src/app/mainview/components/ScreensharingElementPreview.qml

+/*
+ * Copyright (C) 2023 Savoir-faire Linux Inc.
+ * Author: Nicolas Vengeon <Nicolas.vengeon@savoirfairelinux.com>
+
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import QtQuick
+import QtQuick.Controls
+import QtQuick.Layouts
+
+import net.jami.Adapters 1.1
+import net.jami.Models 1.1
+import net.jami.Constants 1.1
+
+import "../../commoncomponents"
+
+Rectangle {
+    id: root
+
+    color: JamiTheme.secondaryBackgroundColor
+    border.color: selectedScreenNumber === elementIndex ? JamiTheme.screenSelectionBorderColor : JamiTheme.tabbarBorderColor
+
+    width: elementWidth
+    height: 3 * width / 4
+
+    property var elementIndex
+    property string rectTitle
+    property var rId
+    property bool isSelectAllScreens
+
+    Text {
+        id: textTitle
+
+        anchors.top: root.top
+        anchors.topMargin: marginSize
+        anchors.horizontalCenter: root.horizontalCenter
+        width: root.width - 2 * marginSize
+
+        font.pointSize: JamiTheme.textFontSize
+        text: rectTitle
+        elide: Text.ElideRight
+        horizontalAlignment: Text.AlignHCenter
+        color: JamiTheme.textColor
+    }
+
+    VideoView {
+        anchors.top: textTitle.bottom
+        anchors.topMargin: 10
+        anchors.horizontalCenter: root.horizontalCenter
+        height: root.height - 50
+        width: root.width - 50
+
+        Component.onDestruction: {
+            VideoDevices.stopDevice(rendererId)
+        }
+        Component.onCompleted: {
+            if (root.rId !== "") {
+                rendererId = VideoDevices.startDevice(root.rId)
+            }
+        }
+    }
+
+    MouseArea {
+        anchors.fill: parent
+        acceptedButtons: Qt.LeftButton
+
+        onClicked: {
+            if (selectedScreenNumber !== root.elementIndex) {
+                selectedScreenNumber = root.elementIndex
+            }
+        }
+    }
+}