Avoid fill flow layout flipping between floating point precisions

Author: peppy

osu.Framework/Graphics/Containers/FlowContainer.cs

@@ -9,6 +9,7 @@
 using System.Linq;
 using osu.Framework.Graphics.Transforms;
 using osu.Framework.Layout;
+using osu.Framework.Utils;
 using osuTK;
 
 namespace osu.Framework.Graphics.Containers
@@ -206,7 +207,7 @@ private void performLayout()
                     var existingTransform = drawable.TransformsForTargetMember(FlowTransform.TARGET_MEMBER).FirstOrDefault(x => x is FlowTransform) as FlowTransform;
                     Vector2 currentTargetPos = existingTransform?.EndValue ?? drawable.Position;
 
-                    if (currentTargetPos == pos) continue;
+                    if (Precision.AlmostEquals(currentTargetPos, pos)) continue;
 
                     if (LayoutDuration > 0)
                         drawable.TransformTo(drawable.PopulateTransform(new FlowTransform { Rewindable = false }, pos, LayoutDuration, LayoutEasing));