Add anim::repeat enumeration (loop / once).

ui/effects/animation_value.h

@@ -14,16 +14,21 @@
 
 namespace anim {
 
-enum class type {
+enum class type : uchar {
 	normal,
 	instant,
 };
 
-enum class activation {
+enum class activation : uchar {
 	normal,
 	background,
 };
 
+enum class repeat : uchar {
+	loop,
+	once,
+};
+
 using transition = Fn<float64(float64 delta, float64 dt)>;
 
 extern transition linear;

ui/layers/box_layer_widget.h

@@ -17,7 +17,7 @@ class Painter;
 struct TextWithEntities;
 
 namespace anim {
-enum class type;
+enum class type : uchar;
 } // namespace anim
 
 namespace style {