Add ability to hide breaks from timeline

This was another IRL request from a mapper / team member. The rationale
here is that it can be very annoying to map with break time enabled if
you have a large gap in the beatmap you are trying to fill with
hitobjects, as you are placing objects on top of a very gray area.

osu.Game/Configuration/OsuConfigManager.cs

@@ -207,6 +207,7 @@ namespace osu.Game.Configuration
             SetDefault<UserStatus?>(OsuSetting.UserOnlineStatus, null);
 
             SetDefault(OsuSetting.EditorTimelineShowTimingChanges, true);
+            SetDefault(OsuSetting.EditorTimelineShowBreaks, true);
             SetDefault(OsuSetting.EditorTimelineShowTicks, true);
 
             SetDefault(OsuSetting.EditorContractSidebars, false);
@@ -439,6 +440,7 @@ namespace osu.Game.Configuration
         AlwaysShowHoldForMenuButton,
         EditorContractSidebars,
         EditorScaleOrigin,
-        EditorRotationOrigin
+        EditorRotationOrigin,
+        EditorTimelineShowBreaks,
     }
 }

osu.Game/Localisation/EditorStrings.cs

@@ -139,6 +139,11 @@ namespace osu.Game.Localisation
         /// </summary>
         public static LocalisableString TimelineShowTimingChanges => new TranslatableString(getKey(@"timeline_show_timing_changes"), @"Show timing changes");
 
+        /// <summary>
+        /// "Show breaks"
+        /// </summary>
+        public static LocalisableString TimelineShowBreaks => new TranslatableString(getKey(@"timeline_show_breaks"), @"Show breaks");
+
         /// <summary>
         /// "Show ticks"
         /// </summary>

osu.Game/Screens/Edit/Compose/Components/Timeline/TimelineBreakDisplay.cs

@@ -6,6 +6,7 @@ using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Caching;
 using osu.Game.Beatmaps.Timing;
+using osu.Game.Configuration;
 using osu.Game.Screens.Edit.Components.Timelines.Summary.Parts;
 
 namespace osu.Game.Screens.Edit.Compose.Components.Timeline
@@ -27,6 +28,15 @@ namespace osu.Game.Screens.Edit.Compose.Components.Timeline
 
         private readonly BindableList<BreakPeriod> breaks = new BindableList<BreakPeriod>();
 
+        private readonly BindableBool showBreaks = new BindableBool(true);
+
+        [BackgroundDependencyLoader]
+        private void load(OsuConfigManager configManager)
+        {
+            configManager.BindWith(OsuSetting.EditorTimelineShowBreaks, showBreaks);
+            showBreaks.BindValueChanged(_ => breakCache.Invalidate());
+        }
+
         protected override void LoadBeatmap(EditorBeatmap beatmap)
         {
             base.LoadBeatmap(beatmap);
@@ -67,6 +77,9 @@ namespace osu.Game.Screens.Edit.Compose.Components.Timeline
         {
             Clear();
 
+            if (!showBreaks.Value)
+                return;
+
             for (int i = 0; i < breaks.Count; i++)
             {
                 var breakPeriod = breaks[i];

osu.Game/Screens/Edit/Editor.cs

@@ -214,6 +214,7 @@ namespace osu.Game.Screens.Edit
         private Bindable<bool> editorAutoSeekOnPlacement;
         private Bindable<bool> editorLimitedDistanceSnap;
         private Bindable<bool> editorTimelineShowTimingChanges;
+        private Bindable<bool> editorTimelineShowBreaks;
         private Bindable<bool> editorTimelineShowTicks;
         private Bindable<bool> editorContractSidebars;
 
@@ -323,6 +324,7 @@ namespace osu.Game.Screens.Edit
             editorAutoSeekOnPlacement = config.GetBindable<bool>(OsuSetting.EditorAutoSeekOnPlacement);
             editorLimitedDistanceSnap = config.GetBindable<bool>(OsuSetting.EditorLimitedDistanceSnap);
             editorTimelineShowTimingChanges = config.GetBindable<bool>(OsuSetting.EditorTimelineShowTimingChanges);
+            editorTimelineShowBreaks = config.GetBindable<bool>(OsuSetting.EditorTimelineShowBreaks);
             editorTimelineShowTicks = config.GetBindable<bool>(OsuSetting.EditorTimelineShowTicks);
             editorContractSidebars = config.GetBindable<bool>(OsuSetting.EditorContractSidebars);
 
@@ -390,6 +392,10 @@ namespace osu.Game.Screens.Edit
                                                     {
                                                         State = { BindTarget = editorTimelineShowTicks }
                                                     },
+                                                    new ToggleMenuItem(EditorStrings.TimelineShowBreaks)
+                                                    {
+                                                        State = { BindTarget = editorTimelineShowBreaks }
+                                                    },
                                                 ]
                                             },
                                             new BackgroundDimMenuItem(editorBackgroundDim),