qml: remember user's peer sort preference

This sets the sort preference for the peers table in qsettings so that
it can be remembered. Also addresses an issue where the `id`
toggle button is always checked when you go back to the table even
though the table is not sorted by `id`.

src/qml/pages/node/Peers.qml

@@ -5,6 +5,7 @@
 import QtQuick 2.15
 import QtQuick.Controls 2.15
 import QtQuick.Layouts 1.15
+import Qt.labs.settings 1.0
 import "../../controls"
 import "../../components"
 
@@ -17,6 +18,15 @@ Page {
         id: navbar
     }
 
+    Settings {
+        id: settings
+        property string lastSortBy: "nodeId"
+    }
+
+    Component.onCompleted: {
+        peerListModelProxy.sortBy = settings.lastSortBy
+    }
+
     ListView {
         id: listView
         clip: true
@@ -53,44 +63,55 @@ Page {
                     ToggleButton {
                         text: qsTr("ID")
                         autoExclusive: true
-                        checked: true
+                        checked: settings.lastSortBy === "nodeId"
                         onClicked: {
                             peerListModelProxy.sortBy = "nodeId"
+                            settings.lastSortBy = "nodeId"
                         }
                     }
                     ToggleButton {
                         text: qsTr("Direction")
                         autoExclusive: true
+                        checked: settings.lastSortBy === "direction"
                         onClicked: {
                             peerListModelProxy.sortBy = "direction"
+                            settings.lastSortBy = "direction"
                         }
                     }
                     ToggleButton {
                         text: qsTr("User Agent")
                         autoExclusive: true
+                        checked: settings.lastSortBy === "subversion"
                         onClicked: {
                             peerListModelProxy.sortBy = "subversion"
+                            settings.lastSortBy = "subversion"
                         }
                     }
                     ToggleButton {
                         text: qsTr("Type")
                         autoExclusive: true
+                        checked: settings.lastSortBy === "connectionType"
                         onClicked: {
                             peerListModelProxy.sortBy = "connectionType"
+                            settings.lastSortBy = "connectionType"
                         }
                     }
                     ToggleButton {
                         text: qsTr("Ip")
                         autoExclusive: true
+                        checked: settings.lastSortBy === "address"
                         onClicked: {
                             peerListModelProxy.sortBy = "address"
+                            settings.lastSortBy = "address"
                         }
                     }
                     ToggleButton {
                         text: qsTr("Network")
                         autoExclusive: true
+                        checked: settings.lastSortBy === "network"
                         onClicked: {
                             peerListModelProxy.sortBy = "network"
+                            settings.lastSortBy = "network"
                         }
                     }
                 }