snap the slider duration in normal drag

osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/SliderSelectionBlueprint.cs

@@ -265,6 +265,8 @@ private void adjustLength(double proposedDistance, bool adjustVelocity)
             else
             {
                 double minDistance = distanceSnapProvider?.GetBeatSnapDistanceAt(HitObject, false) * oldVelocityMultiplier ?? 1;
+                // Add a small amount to the proposed distance to make it easier to snap to the full length of the slider.
+                proposedDistance = distanceSnapProvider?.FindSnappedDistance(HitObject, (float)proposedDistance + 1) ?? proposedDistance;
                 proposedDistance = MathHelper.Clamp(proposedDistance, minDistance, HitObject.Path.CalculatedDistance);
             }