Move QML files to src/qml and don't use internal qml modules

src/qml/Component/Login/Loading.qml

@@ -0,0 +1,27 @@
+// SPDX-FileCopyrightText: 2020 Tobias Fella <fella@posteo.de>
+// SPDX-License-Identifier: GPL-3.0-only
+
+import QtQuick 2.15
+import QtQuick.Controls 2.15 as QQC2
+import QtQuick.Layouts 1.15
+
+import org.kde.kirigami 2.15 as Kirigami
+
+import org.kde.neochat 1.0
+
+Kirigami.PlaceholderMessage {
+    property var showContinueButton: false
+    property var showBackButton: false
+    property string title: i18n("Loading…")
+
+    anchors.centerIn: parent
+
+    QQC2.Label {
+        text: i18n("Please wait. This might take a little while.")
+    }
+
+    QQC2.BusyIndicator {
+        Layout.alignment: Qt.AlignHCenter
+        running: false
+    }
+}