Add InterpretationSection and its bindable in IssueList

We'll eventually connect that bindable so that checks can access it.

osu.Game/Screens/Edit/Verify/InterpretationSection.cs

@@ -0,0 +1,34 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Game.Beatmaps;
+using osu.Game.Overlays.Settings;
+
+namespace osu.Game.Screens.Edit.Verify
+{
+    internal class InterpretationSection : Section
+    {
+        public InterpretationSection(IssueList issueList)
+            : base(issueList)
+        {
+        }
+
+        protected override string Header => "Interpretation";
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            var dropdown = new SettingsEnumDropdown<DifficultyRating>
+            {
+                Anchor = Anchor.CentreLeft,
+                Origin = Anchor.CentreLeft,
+                TooltipText = "Affects checks that depend on difficulty level"
+            };
+            dropdown.Current.BindTo(IssueList.InterpretedDifficulty);
+
+            Flow.Add(dropdown);
+        }
+    }
+}

osu.Game/Screens/Edit/Verify/IssueList.cs

@@ -36,6 +36,8 @@ namespace osu.Game.Screens.Edit.Verify
 
         public Dictionary<IssueType, Bindable<bool>> ShowType { get; set; }
 
+        public Bindable<DifficultyRating> InterpretedDifficulty { get; set; }
+
         private IBeatmapVerifier rulesetVerifier;
         private BeatmapVerifier generalVerifier;
 
@@ -53,6 +55,8 @@ namespace osu.Game.Screens.Edit.Verify
             generalVerifier = new BeatmapVerifier();
             rulesetVerifier = beatmap.BeatmapInfo.Ruleset?.CreateInstance()?.CreateBeatmapVerifier();
 
+            InterpretedDifficulty = new Bindable<DifficultyRating>(beatmap.BeatmapInfo.DifficultyRating);
+
             RelativeSizeAxes = Axes.Both;
 
             InternalChildren = new Drawable[]

osu.Game/Screens/Edit/Verify/IssueSettings.cs

@@ -17,6 +17,7 @@ namespace osu.Game.Screens.Edit.Verify
 
         protected override IReadOnlyList<Drawable> CreateSections() => new Drawable[]
         {
+            new InterpretationSection(issueList),
             new VisibilitySection(issueList)
         };
     }