Modify layout of rotation mode settings options

interface/resources/qml/dialogs/preferences/RadioButtonsPreference.qml

@@ -11,10 +11,11 @@
 import QtQuick 2.5
 
 import "../../controls-uit"
+import "../../styles-uit"
 
 Preference {
     id: root
-    
+
     height: control.height + hifi.dimensions.controlInterlineHeight
 
     Component.onCompleted: {
@@ -33,23 +34,35 @@ Preference {
         preference.save();
     }
 
-    Row {
+    Column {
         id: control
         anchors {
             left: parent.left
             right: parent.right
             bottom: parent.bottom
         }
-        spacing: 5
+        spacing: 3
+
+        RalewaySemiBold {
+            id: heading
+            size: hifi.fontSizes.inputLabel
+            text: preference.heading
+            color: hifi.colors.lightGrayText
+            visible: text !== ""
+            bottomPadding: 3
+        }
 
         Repeater {
             id: repeater
             model: preference.items.length
             delegate: RadioButton {
                 text: preference.items[index]
+                letterSpacing: 0
                 anchors {
-                    verticalCenter: parent.verticalCenter
+                    left: parent.left
                 }
+
+                leftPadding: 0
                 colorScheme: hifi.colorSchemes.dark
             }
         }

interface/src/ui/PreferencesDialog.cpp

@@ -245,6 +245,7 @@ void setupPreferences() {
         auto preference = new RadioButtonsPreference(VR_MOVEMENT, "Snap turn / Smooth turn", getter, setter);
         QStringList items;
         items << "Snap turn" << "Smooth turn";
+        preference->setHeading("Rotation mode");
         preference->setItems(items);
         preferences->addPreference(preference);
     }

libraries/shared/src/Preferences.h

@@ -356,16 +356,20 @@ public:
 
 class RadioButtonsPreference : public IntPreference {
     Q_OBJECT
+    Q_PROPERTY(QString heading READ getHeading CONSTANT)
     Q_PROPERTY(QStringList items READ getItems CONSTANT)
 public:
     RadioButtonsPreference(const QString& category, const QString& name, Getter getter, Setter setter)
         : IntPreference(category, name, getter, setter) { }
     Type getType() override { return RadioButtons; }
 
+    const QString& getHeading() { return _heading; }
     const QStringList& getItems() { return _items; }
+    void setHeading(const QString& heading) { _heading = heading; }
     void setItems(const QStringList& items) { _items = items; }
 
 protected:
+    QString _heading;
     QStringList _items;
 };
 #endif