Rename CheckUnsnaps -> CheckUnsnappedObjects

Will potentially have `CheckUnsnappedKiai` or similar later, so this is worth specifying.

Also consistent with `CheckConcurrentObjects`, which will likely have a `CheckConcurrentLines` later.

osu.Game/Rulesets/Edit/BeatmapVerifier.cs

@@ -25,7 +25,7 @@ namespace osu.Game.Rulesets.Edit
             new CheckAudioQuality(),
 
             // Compose
-            new CheckUnsnaps(),
+            new CheckUnsnappedObjects(),
             new CheckConcurrentObjects()
         };
 

osu.Game/Rulesets/Edit/Checks/CheckConcurrentObjects.cs

@@ -12,7 +12,7 @@ namespace osu.Game.Rulesets.Edit.Checks
     public class CheckConcurrentObjects : ICheck
     {
         // We guarantee that the objects are either treated as concurrent or unsnapped when near the same beat divisor.
-        private const double ms_leniency = CheckUnsnaps.UNSNAP_MS_THRESHOLD;
+        private const double ms_leniency = CheckUnsnappedObjects.UNSNAP_MS_THRESHOLD;
 
         public CheckMetadata Metadata { get; } = new CheckMetadata(CheckCategory.Compose, "Concurrent hitobjects");
 

osu.Game/Rulesets/Edit/Checks/CheckUnsnappedObjects.cs

@@ -10,7 +10,7 @@ using osu.Game.Rulesets.Objects.Types;
 
 namespace osu.Game.Rulesets.Edit.Checks
 {
-    public class CheckUnsnaps : ICheck
+    public class CheckUnsnappedObjects : ICheck
     {
         public const double UNSNAP_MS_THRESHOLD = 2;