make Constants an Item and a child of main so it properly inherits material

style settings from main

electrum/gui/qml/components/Constants.qml

@@ -1,7 +1,7 @@
 import QtQuick 2.6
 import QtQuick.Controls.Material 2.0
 
-QtObject {
+Item {
     readonly property int paddingTiny: 4
     readonly property int paddingSmall: 8
     readonly property int paddingMedium: 12
@@ -24,4 +24,5 @@ QtObject {
 
     property color colorCredit: "#ff80ff80"
     property color colorDebit: "#ffff8080"
+    property color mutedForeground: Qt.lighter(Material.background, 2)
 }

electrum/gui/qml/components/RequestDialog.qml

@@ -29,10 +29,10 @@ Dialog {
             text: dialog.title
             visible: dialog.title
             elide: Label.ElideRight
-            padding: 24
+            padding: constants.paddingXLarge
             bottomPadding: 0
             font.bold: true
-            font.pixelSize: 16
+            font.pixelSize: constants.fontSizeMedium
         }
     }
 

electrum/gui/qml/components/WalletMainView.qml

@@ -53,12 +53,12 @@ Item {
     ColumnLayout {
         anchors.centerIn: parent
         width: parent.width
-        spacing: 40
+        spacing: 2*constants.paddingXLarge
         visible: Daemon.currentWallet == null
 
         Label {
             text: qsTr('No wallet loaded')
-            font.pixelSize: 24
+            font.pixelSize: constants.fontSizeXXLarge
             Layout.alignment: Qt.AlignHCenter
         }
 

electrum/gui/qml/components/Wallets.qml

@@ -88,7 +88,7 @@ Pane {
                         }
 
                         Label {
-                            font.pixelSize: 18
+                            font.pixelSize: constants.fontSizeLarge
                             text: model.name
                             Layout.fillWidth: true
                         }

electrum/gui/qml/components/controls/InfoTextArea.qml

@@ -28,8 +28,8 @@ GridLayout {
         id: infotext
         Layout.fillWidth: true
         readOnly: true
-        rightPadding: 16
-        leftPadding: 64
+        rightPadding: constants.paddingLarge
+        leftPadding: 2*constants.iconSizeLarge
         wrapMode: TextInput.WordWrap
         textFormat: TextEdit.RichText
         background: Rectangle {
@@ -40,10 +40,10 @@ GridLayout {
             source: iconStyle == InfoTextArea.IconStyle.Info ? "../../../icons/info.png" : InfoTextArea.IconStyle.Warn ? "../../../icons/warning.png" : InfoTextArea.IconStyle.Error ? "../../../icons/expired.png" : ""
             anchors.left: parent.left
             anchors.top: parent.top
-            anchors.leftMargin: 16
-            anchors.topMargin: 16
-            height: 32
-            width: 32
+            anchors.leftMargin: constants.paddingLarge
+            anchors.topMargin: constants.paddingLarge
+            height: constants.iconSizeLarge
+            width: constants.iconSizeLarge
             fillMode: Image.PreserveAspectCrop
         }
 

electrum/gui/qml/components/main.qml

@@ -21,7 +21,8 @@ ApplicationWindow
     Material.primary: Material.Indigo
     Material.accent: Material.LightBlue
 
-    property QtObject constants: Constants {}
+    property Item constants: appconstants
+    Constants { id: appconstants }
 
     property alias stack: mainStackView