Revert "Rename element in OsuSettings enum"

This reverts commit c2bbe17562.

osu.Game/Configuration/OsuConfigManager.cs

@@ -101,7 +101,7 @@ namespace osu.Game.Configuration
             SetDefault(OsuSetting.HitLighting, true);
 
             SetDefault(OsuSetting.HUDVisibilityMode, HUDVisibilityMode.Always);
-            SetDefault(OsuSetting.ShowDifficultyGraph, true);
+            SetDefault(OsuSetting.ShowProgressGraph, true);
             SetDefault(OsuSetting.ShowHealthDisplayWhenCantFail, true);
             SetDefault(OsuSetting.FadePlayfieldWhenHealthLow, true);
             SetDefault(OsuSetting.KeyOverlay, false);
@@ -217,7 +217,7 @@ namespace osu.Game.Configuration
         AlwaysPlayFirstComboBreak,
         FloatingComments,
         HUDVisibilityMode,
-        ShowDifficultyGraph,
+        ShowProgressGraph,
         ShowHealthDisplayWhenCantFail,
         FadePlayfieldWhenHealthLow,
         MouseDisableButtons,

osu.Game/Overlays/Settings/Sections/Gameplay/GeneralSettings.cs

@@ -46,7 +46,7 @@ namespace osu.Game.Overlays.Settings.Sections.Gameplay
                 new SettingsCheckbox
                 {
                     LabelText = "Show difficulty graph on progress bar",
-                    Current = config.GetBindable<bool>(OsuSetting.ShowDifficultyGraph)
+                    Current = config.GetBindable<bool>(OsuSetting.ShowProgressGraph)
                 },
                 new SettingsCheckbox
                 {

osu.Game/Screens/Play/SongProgress.cs

@@ -125,7 +125,7 @@ namespace osu.Game.Screens.Play
                 Objects = drawableRuleset.Objects;
             }
 
-            config.BindWith(OsuSetting.ShowDifficultyGraph, ShowGraph);
+            config.BindWith(OsuSetting.ShowProgressGraph, ShowGraph);
 
             graph.FillColour = bar.FillColour = colours.BlueLighter;
         }