replace kWidget enum with string

src/node.h

@@ -55,51 +55,6 @@ enum class kAttribute : uint16_t
     TextVerticalAlign = const_hash("text-vertical-align"),
 };
 
-enum class kWidget : uint16_t
-{
-    Node = const_hash("node"),
-    Border = const_hash("border"),
-    Shape = const_hash("shape"),
-    Text = const_hash("text"),
-    TextInput = const_hash("text-input"),
-    Image = const_hash("image"),
-    ImageTexture = const_hash("image-texture"),
-    Icon = const_hash("icon"),
-    Button = const_hash("button"),
-    ButtonCustom = const_hash("button-custom"),
-    ComboBox = const_hash("combobox"),
-    SliderH = const_hash("slider-h"),
-    SliderV = const_hash("slider-v"),
-    SliderHue = const_hash("slider-hue"),
-    PopupMenu = const_hash("popup-menu"),
-    Viewport = const_hash("viewport"),
-    Ref = const_hash("ref"),
-    CheckBox = const_hash("checkbox"),
-    Layer = const_hash("layer"),
-    PanelLayer = const_hash("panel-layer"),
-    PanelBrush = const_hash("panel-brush"),
-    PanelColor = const_hash("panel-color"),
-    PanelStroke = const_hash("panel-stroke"),
-    PanelGrid = const_hash("panel-grid"),
-    PanelQuick = const_hash("panel-quick"),
-    ColorQuad = const_hash("color-quad"),
-    StrokePreview = const_hash("stroke-preview"),
-    Canvas = const_hash("canvas"),
-    Scroll = const_hash("scroll"),
-    DialogBrowse = const_hash("dialog-browse"),
-    DialogBrowseItem = const_hash("dialog-browse-item"),
-    DialogCloud = const_hash("dialog-cloud"),
-    DialogCloudItem = const_hash("dialog-cloud-item"),
-    ColorWheel = const_hash("colorwheel"),
-    ColorPicker = const_hash("color-picker"),
-    About = const_hash("about"),
-    Changelog = const_hash("changelog"),
-    UserManual = const_hash("usermanual"),
-    ToolBucket = const_hash("tool-bucket"),
-    Timeline   = const_hash("timeline"),
-    Metadata   = const_hash("metadata"),
-};
-
 class Node : public std::enable_shared_from_this<Node>
 {
     friend class LayoutManager;