QML: warning fixes

pages/Keys.qml

@@ -251,7 +251,7 @@ Rectangle {
                 onClicked: {
                     loadPage("Settings")
                 }
-                anchors.horizontalCenter: parent.horizontalCenter
+                Layout.alignment: Qt.AlignCenter
                 width: 135
             }
         }

pages/merchant/MerchantCheckbox.qml

@@ -4,38 +4,55 @@ import QtGraphicalEffects 1.0
 
 import "../../components" as MoneroComponents
 
-RowLayout {
+Item {
     id: root
-    spacing: 10
     property bool checked: false;
     property alias text: content.text
     signal changed;
 
-    Rectangle {
-        id: checkbox
-        anchors.left: parent.left
-        anchors.top: parent.top
-        implicitHeight: 22
-        width: 22
-        radius: 5
+    width: checkBoxLayout.width
+    height: 22
 
-        Image {
-            id: imageChecked
-            visible: root.checked
-            anchors.centerIn: parent
-            source: "qrc:///images/uncheckedIcon.png"
+    RowLayout {
+        id: checkBoxLayout
+        spacing: 10
+
+        Item {
+            height: root.height
+            width: root.height
+            Rectangle {
+                id: checkbox
+                anchors.fill: parent
+                radius: 5
+
+                Image {
+                    id: imageChecked
+                    visible: root.checked
+                    anchors.centerIn: parent
+                    source: "qrc:///images/uncheckedIcon.png"
+                }
+            }
+            DropShadow {
+                anchors.fill: source
+                cached: true
+                horizontalOffset: 3
+                verticalOffset: 3
+                radius: 8.0
+                samples: 16
+                color: "#20000000"
+                smooth: true
+                source: checkbox
+            }
+        }
+        MoneroComponents.TextPlain {
+            id: content
+            font.pixelSize: 14
+            font.bold: false
+            color: "white"
+            text: ""
+            themeTransition: false
         }
     }
-
-    MoneroComponents.TextPlain {
-        id: content
-        font.pixelSize: 14
-        font.bold: false
-        color: "white"
-        text: ""
-        themeTransition: false
-    }
-
     MouseArea {
         anchors.fill: parent
         hoverEnabled: true
@@ -46,16 +63,4 @@ RowLayout {
             changed();
         }
     }
-
-    DropShadow {
-        anchors.fill: source
-        cached: true
-        horizontalOffset: 3
-        verticalOffset: 3
-        radius: 8.0
-        samples: 16
-        color: "#20000000"
-        smooth: true
-        source: checkbox
-    }
 }

src/libwalletqt/WalletManager.cpp

@@ -376,7 +376,7 @@ bool WalletManager::localDaemonSynced() const
 
 bool WalletManager::isDaemonLocal(const QString &daemon_address) const
 {
-    return Monero::Utils::isAddressLocal(daemon_address.toStdString());
+    return daemon_address.isEmpty() ? false : Monero::Utils::isAddressLocal(daemon_address.toStdString());
 }
 
 QString WalletManager::resolveOpenAlias(const QString &address) const