NSettingsIndicator: add default setting indicator (#1080)

N*Widgets: show NSettingsIndicator if settings are not default

Widgets/NSpinBox.qml

@@ -19,6 +19,9 @@ RowLayout {
   property bool enabled: true
   property bool hovering: false
   property int baseSize: Style.baseWidgetSize
+  property bool isSettings: false
+  property var defaultValue: 0
+  property string settingsPath: ""
 
   // Convenience properties for common naming
   property alias minimum: root.from
@@ -37,6 +40,11 @@ RowLayout {
 
   Layout.fillWidth: true
 
+  readonly property bool isValueChanged: isSettings && (value !== defaultValue)
+  readonly property string indicatorTooltip: isSettings ? I18n.tr("settings.indicator.default-value", {
+                                                                   "value": String(defaultValue)
+                                                                 }) : ""
+
   Timer {
     id: repeatTimer
     repeat: true
@@ -78,6 +86,8 @@ RowLayout {
   NLabel {
     label: root.label
     description: root.description
+    showIndicator: root.isSettings && root.isValueChanged
+    indicatorTooltip: root.indicatorTooltip
   }
 
   // Main spinbox container
@@ -405,4 +415,5 @@ RowLayout {
       }
     }
   }
+
 }