Adding missing copyright and licence headers

src/effects/effectstack/view/qml/BuiltStack.qml

+/*
+    SPDX-FileCopyrightText: 2018 Jean-Baptiste Mardelle <jb@kdenlive.org>
+    SPDX-License-Identifier: LicenseRef-KDE-Accepted-GPL
+*/
+
 import QtQuick 2.11
 import QtQuick.Controls 1.4
 import QtQuick.Controls.Styles 1.4

src/effects/effectstack/view/qml/LiftGammaGain.qml

+/*
+    SPDX-FileCopyrightText: 2018 Jean-Baptiste Mardelle <jb@kdenlive.org>
+    SPDX-License-Identifier: LicenseRef-KDE-Accepted-GPL
+*/
+
 import QtQuick 2.11
 import QtQuick.Controls 1.4
 import QtQuick.Controls.Styles 1.4

src/monitor/view/EffectToolBar.qml

+/*
+    SPDX-FileCopyrightText: 2016 Jean-Baptiste Mardelle <jb@kdenlive.org>
+    SPDX-FileCopyrightText: 2021 Julius Künzel <jk.kdedev@smartlab.uber.space>
+    SPDX-License-Identifier: LicenseRef-KDE-Accepted-GPL
+*/
+
 import QtQuick.Controls 2.4
 import QtQuick 2.11
 

src/monitor/view/MonitorRuler.qml

+/*
+    SPDX-FileCopyrightText: 2017 Jean-Baptiste Mardelle <jb@kdenlive.org>
+    SPDX-License-Identifier: LicenseRef-KDE-Accepted-GPL
+*/
+
 import QtQuick.Controls 2.4
 import Kdenlive.Controls 1.0
 import QtQuick 2.11

src/monitor/view/OverlayCenter.qml

+/*
+    SPDX-FileCopyrightText: 2020 Jean-Baptiste Mardelle <jb@kdenlive.org>
+    SPDX-FileCopyrightText: 2018  Willian Pessoa
+    SPDX-License-Identifier: LicenseRef-KDE-Accepted-GPL
+*/
+
 import QtQuick.Controls 1.4
 import QtQuick.Controls.Styles 1.4
 import QtQuick 2.11

src/monitor/view/OverlayCenterDiagonal.qml

+/*
+    SPDX-FileCopyrightText: 2020 Jean-Baptiste Mardelle <jb@kdenlive.org>
+    SPDX-FileCopyrightText: 2018  Willian Pessoa
+    SPDX-License-Identifier: LicenseRef-KDE-Accepted-GPL
+*/
+
 import QtQuick.Controls 1.4
 import QtQuick.Controls.Styles 1.4
 import QtQuick 2.11

src/monitor/view/OverlayMinimal.qml

+/*
+    SPDX-FileCopyrightText: 2018 Jean-Baptiste Mardelle <jb@kdenlive.org>
+    SPDX-License-Identifier: LicenseRef-KDE-Accepted-GPL
+*/
+
 import QtQuick.Controls 1.4
 import QtQuick.Controls.Styles 1.4
 import QtQuick 2.11

src/monitor/view/OverlayStandard.qml

+/*
+    SPDX-FileCopyrightText: 2018 Jean-Baptiste Mardelle <jb@kdenlive.org>
+    SPDX-License-Identifier: LicenseRef-KDE-Accepted-GPL
+*/
+
 import QtQuick.Controls 1.4
 import QtQuick.Controls.Styles 1.4
 import QtQuick 2.11

src/monitor/view/OverlayThirds.qml

+/*
+    SPDX-FileCopyrightText: 2018 Jean-Baptiste Mardelle <jb@kdenlive.org>
+    SPDX-License-Identifier: LicenseRef-KDE-Accepted-GPL
+*/
+
 import QtQuick.Controls 1.4
 import QtQuick.Controls.Styles 1.4
 import QtQuick 2.11

src/monitor/view/SceneToolBar.qml

+/*
+    SPDX-FileCopyrightText: 2016 Jean-Baptiste Mardelle <jb@kdenlive.org>
+    SPDX-License-Identifier: LicenseRef-KDE-Accepted-GPL
+*/
+
 import QtQuick.Controls 2.4
 import QtQuick 2.11
 

src/monitor/view/kdenliveclipmonitor.qml

+/*
+    SPDX-FileCopyrightText: 2015 Jean-Baptiste Mardelle <jb@kdenlive.org>
+    SPDX-License-Identifier: LicenseRef-KDE-Accepted-GPL
+*/
+
 import QtQuick.Controls 2.4
 import QtQuick.Window 2.2
 import Kdenlive.Controls 1.0

src/monitor/view/kdenlivemonitor.qml

+/*
+    SPDX-FileCopyrightText: 2015 Jean-Baptiste Mardelle <jb@kdenlive.org>
+    SPDX-License-Identifier: LicenseRef-KDE-Accepted-GPL
+*/
+
 import QtQuick.Controls 2.4
 import QtQuick.Window 2.2
 import Kdenlive.Controls 1.0

src/monitor/view/kdenlivemonitorcornerscene.qml

+/*
+    SPDX-FileCopyrightText: 2016 Jean-Baptiste Mardelle <jb@kdenlive.org>
+    SPDX-License-Identifier: LicenseRef-KDE-Accepted-GPL
+*/
+
 import QtQuick 2.11
 
 Item {

src/monitor/view/kdenlivemonitoreffectscene.qml

+/*
+    SPDX-FileCopyrightText: 2015 Jean-Baptiste Mardelle <jb@kdenlive.org>
+    SPDX-License-Identifier: LicenseRef-KDE-Accepted-GPL
+*/
+
 import QtQuick 2.11
 
 Item {

src/monitor/view/kdenlivemonitorripple.qml

+/*
+    SPDX-FileCopyrightText: 2016 Jean-Baptiste Mardelle <jb@kdenlive.org>
+    SPDX-License-Identifier: LicenseRef-KDE-Accepted-GPL
+*/
+
 import QtQuick 2.11
 
 Item {

src/monitor/view/kdenlivemonitorrotoscene.qml

+/*
+    SPDX-FileCopyrightText: 2016 Jean-Baptiste Mardelle <jb@kdenlive.org>
+    SPDX-FileCopyrightText: 2021 Julius Künzel <jk.kdedev@smartlab.uber.space>
+    SPDX-License-Identifier: LicenseRef-KDE-Accepted-GPL
+*/
+
 import QtQuick 2.11
 import QtQuick.Controls 1.4
 

src/monitor/view/kdenlivemonitorsplit.qml

+/*
+    SPDX-FileCopyrightText: 2015 Jean-Baptiste Mardelle <jb@kdenlive.org>
+    SPDX-License-Identifier: LicenseRef-KDE-Accepted-GPL
+*/
+
 import QtQuick 2.11
 import QtQuick.Controls 1.4
 import QtQuick.Controls.Styles 1.4

src/monitor/view/kdenlivemonitorsplittracks.qml

+/*
+    SPDX-FileCopyrightText: 2020 Jean-Baptiste Mardelle <jb@kdenlive.org>
+    SPDX-License-Identifier: LicenseRef-KDE-Accepted-GPL
+*/
+
 import QtQuick 2.11
 import QtQuick.Controls 2.4
 

src/timeline2/view/qml/AudioLevels.qml

+/*
+    SPDX-FileCopyrightText: 2019 Jean-Baptiste Mardelle <jb@kdenlive.org>
+    SPDX-License-Identifier: LicenseRef-KDE-Accepted-GPL
+*/
+
 import QtQuick 2.11
 import QtGraphicalEffects 1.0
 import QtQuick.Layouts 1.11

src/timeline2/view/qml/ClipAudioThumbs.qml

+/*
+    SPDX-FileCopyrightText: 2018 Jean-Baptiste Mardelle <jb@kdenlive.org>
+    SPDX-License-Identifier: LicenseRef-KDE-Accepted-GPL
+*/
+
 import QtQuick 2.11
 import QtQuick.Controls 2.4
 import Kdenlive.Controls 1.0