KCMs: port Desktoptheme and icons to use SettingStateBinding

Use new SettingStateBinding introduced by frameworks/kdeclarative!4 and
also to support highlight of non default settings

see plasma/breeze!12

kcms/desktoptheme/package/contents/ui/main.qml

@@ -25,11 +25,12 @@ import QtQuick.Dialogs 1.0
 import QtQuick.Controls 2.3 as QtControls
 import org.kde.kirigami 2.8 as Kirigami
 import org.kde.newstuff 1.62 as NewStuff
-import org.kde.kcm 1.1 as KCM
+import org.kde.kcm 1.3 as KCM
 import org.kde.private.kcms.desktoptheme 1.0 as Private
 
 
 KCM.GridViewKCM {
+    id: root
     KCM.ConfigModule.quickHelp: i18n("This module lets you choose the Plasma style.")
 
     view.model: kcm.filteredModel
@@ -47,7 +48,11 @@ KCM.GridViewKCM {
         value:  filterCombo.model[filterCombo.currentIndex].filter
     }
 
-    enabled: !kcm.downloadingFile && !kcm.desktopThemeSettings.isImmutable("name")
+    KCM.SettingStateBinding {
+        configObject: kcm.desktopThemeSettings
+        settingName: "name"
+        extraEnabledConditions: !kcm.downloadingFile
+    }
 
     DropArea {
         anchors.fill: parent

kcms/icons/package/contents/ui/IconSizePopup.qml

@@ -22,6 +22,7 @@ import QtQuick 2.7
 import QtQuick.Layouts 1.1
 import QtQuick.Controls 2.3 as QtControls
 import org.kde.kirigami 2.4 as Kirigami
+import org.kde.kcm 1.3 as KCM
 
 QtControls.Popup {
     id: iconSizePopup
@@ -110,7 +111,12 @@ QtControls.Popup {
                 to: sizes.length - 1
                 stepSize: 1.0
                 snapMode: QtControls.Slider.SnapAlways
-                enabled: sizes.length > 0 && !kcm.iconsSettings.isImmutable(iconTypeList.currentItem.configKey)
+
+                KCM.SettingStateBinding {
+                    configObject: kcm.iconsSettings
+                    settingName: iconTypeList.currentItem.configKey
+                    extraEnabledConditions: parent.sizes.length > 0
+                }
 
                 onMoved: {
                     kcm.iconsSettings[iconTypeList.currentItem.configKey] = iconSizeSlider.sizes[iconSizeSlider.value] || 0

kcms/icons/package/contents/ui/main.qml

@@ -26,20 +26,25 @@ import QtQuick.Controls 2.3 as QtControls
 import org.kde.kirigami 2.4 as Kirigami
 import org.kde.kquickcontrolsaddons 2.0 as KQCAddons
 import org.kde.newstuff 1.62 as NewStuff
-import org.kde.kcm 1.1 as KCM
+import org.kde.kcm 1.3 as KCM
 
 import org.kde.private.kcms.icons 1.0 as Private
 
 KCM.GridViewKCM {
+    id: root
     KCM.ConfigModule.quickHelp: i18n("This module allows you to choose the icons for your desktop.")
 
     view.model: kcm.iconsModel
     view.currentIndex: kcm.pluginIndex(kcm.iconsSettings.theme)
     enabled: !kcm.downloadingFile
-    view.enabled: !kcm.iconsSettings.isImmutable("Theme")
+
+    KCM.SettingStateBinding {
+        configObject: kcm.iconsSettings
+        settingName: "Theme"
+    }
 
     DropArea {
-        enabled: !kcm.iconsSettings.isImmutable("Theme")
+        enabled: view.enabled
         anchors.fill: parent
         onEntered: {
             if (!drag.hasUrls) {
@@ -244,8 +249,8 @@ KCM.GridViewKCM {
             }
 
             QtControls.Button {
-                enabled: !kcm.iconsSettings.isImmutable("Theme")
                 id: installFromFileButton
+                enabled: root.view.enabled
                 text: i18n("Install from File...")
                 icon.name: "document-import"
                 onClicked: fileDialogLoader.active = true
@@ -253,6 +258,7 @@ KCM.GridViewKCM {
 
             NewStuff.Button {
                 id: newStuffButton
+                enabled: root.view.enabled
                 text: i18n("Get New Icons...")
                 configFile: "icons.knsrc"
                 viewMode: NewStuff.Page.ViewMode.Preview