add PaneInsetBackground

electrum/gui/qml/components/PaneInsetBackground.qml

@@ -0,0 +1,33 @@
+import QtQuick 2.6
+import QtQuick.Controls.Material 2.0
+
+Rectangle {
+    Rectangle {
+        anchors { left: parent.left; top: parent.top; right: parent.right }
+        height: 1
+        color: Qt.darker(Material.background, 1.50)
+    }
+    Rectangle {
+        anchors { left: parent.left; top: parent.top; bottom: parent.bottom }
+        width: 1
+        color: Qt.darker(Material.background, 1.50)
+    }
+    Rectangle {
+        anchors { left: parent.left; bottom: parent.bottom; right: parent.right }
+        height: 1
+        color: Qt.lighter(Material.background, 1.50)
+    }
+    Rectangle {
+        anchors { right: parent.right; top: parent.top; bottom: parent.bottom }
+        width: 1
+        color: Qt.lighter(Material.background, 1.50)
+    }
+    color: Qt.darker(Material.background, 1.15)
+    Image {
+        source: '../../icons/electrum_lightblue.svg'
+        anchors.centerIn: parent
+        sourceSize.width: 128
+        sourceSize.height: 128
+        opacity: 0.1
+    }
+}