New icons: more icons and cleanup

Modules/SettingsPanel/Tabs/AudioTab.qml

@@ -272,7 +272,7 @@ ColumnLayout {
 
         // Button aligned to the center of the actual input field
         NIconButton {
-          icon: "plus-lg"
+          icon: "add"
           Layout.alignment: Qt.AlignBottom
           Layout.bottomMargin: blacklistInput.description ? Style.marginS * scaling : 0
           onClicked: {
@@ -322,7 +322,7 @@ ColumnLayout {
               }
 
               NIconButton {
-                icon: "x-lg"
+                icon: "close"
                 sizeRatio: 0.8
                 Layout.alignment: Qt.AlignVCenter
                 Layout.rightMargin: Style.marginXS * scaling

Modules/SettingsPanel/Tabs/DisplayTab.qml

@@ -181,7 +181,7 @@ ColumnLayout {
                 }
 
                 NIconButton {
-                  icon: "arrow-repeat"
+                  icon: "refresh"
                   tooltipText: "Reset scaling"
                   onClicked: ScalingService.setScreenScale(modelData, 1.0)
                 }

Modules/SettingsPanel/Tabs/WallpaperSelectorTab.qml

@@ -96,7 +96,7 @@ ColumnLayout {
     }
 
     NIconButton {
-      icon: "arrow-repeat"
+      icon: "refresh"
       tooltipText: "Refresh wallpaper list"
       onClicked: {
         WallpaperService.refreshWallpapersList()