qt,qml: add a welcome page as initial page for server connect wizard

This is much less intimidating than asking if the user wants to use a proxy
out of the gate.

electrum/gui/qml/components/wizard/WCAutoConnect.qml

@@ -6,6 +6,7 @@ import "../controls"
 
 WizardComponent {
     valid: true
+    title: qsTr('Server')
 
     function apply() {
         wizard_data['autoconnect'] = serverconnectgroup.checkedButton.connecttype === 'auto'

electrum/gui/qml/components/wizard/WCProxyAsk.qml

@@ -7,6 +7,7 @@ import "../controls"
 
 WizardComponent {
     valid: true
+    title: qsTr('Proxy')
 
     function apply() {
         wizard_data['want_proxy'] = wantproxygroup.checkedButton.wantproxy

electrum/gui/qml/components/wizard/WCProxyConfig.qml

@@ -6,6 +6,7 @@ import "../controls"
 
 WizardComponent {
     valid: true
+    title: qsTr('Proxy')
 
     function apply() {
         wizard_data['proxy'] = pc.toProxyDict()

electrum/gui/qml/components/wizard/WCServerConfig.qml

@@ -7,6 +7,7 @@ import "../controls"
 WizardComponent {
     valid: true
     last: true
+    title: qsTr('Server')
 
     function apply() {
         wizard_data['autoconnect'] = sc.address == ""

electrum/gui/qml/components/wizard/WCWelcome.qml

@@ -0,0 +1,48 @@
+import QtQuick
+import QtQuick.Layouts
+import QtQuick.Controls
+
+// import org.electrum 1.0
+
+import "../controls"
+
+WizardComponent {
+    valid: true
+    title: qsTr('Electrum Bitcoin Wallet')
+
+    function apply() {
+        wizard_data['use_defaults'] = use_defaults.checked
+        if (use_defaults.checked) {
+            wizard_data['autoconnect'] = true
+            wizard_data['want_proxy'] = false
+        }
+    }
+
+    ColumnLayout {
+        width: parent.width
+
+        Image {
+            Layout.fillWidth: true
+            fillMode: Image.PreserveAspectFit
+            source: Qt.resolvedUrl('../../../icons/electrum_presplash.png')
+            // reduce spacing a bit
+            Layout.topMargin: -50
+            Layout.bottomMargin: -160
+        }
+
+        Label {
+            Layout.alignment: Qt.AlignHCenter
+            text: qsTr('Welcome')
+            font.pixelSize: constants.fontSizeXLarge
+            Layout.bottomMargin: constants.paddingXXLarge
+        }
+
+        CheckBox {
+            id: use_defaults
+            Layout.alignment: Qt.AlignHCenter
+            text: qsTr('Use default network settings')
+            checked: true
+            onCheckedChanged: checkIsLast()
+        }
+    }
+}

electrum/gui/qml/components/wizard/Wizard.qml

@@ -15,7 +15,8 @@ ElDialog {
 
     padding: 0
 
-    title: wizardTitle + (pages.currentItem.title ? ' - ' + pages.currentItem.title : '')
+    title: (pages.currentItem.wizard_title ? pages.currentItem.wizard_title : wizardTitle) +
+        (pages.currentItem.title ? ' - ' + pages.currentItem.title : '')
     iconSource: '../../../icons/electrum.png'
 
     // android back button triggers close() on Popups. Disabling close here,

electrum/gui/qml/components/wizard/WizardComponent.qml

@@ -10,6 +10,7 @@ Pane {
     property var wizard_data : ({})
     property bool valid
     property bool last: false
+    property string wizard_title: ''
     property string title: ''
     property bool securePage: false