1.8.0: Added target frame rate and PlayerPrefs.Delete to toolbar

- Added: Tooltips on all buttons and labels in toolbar tools
- Added: Target frame rate with `[min;max]` slider in toolbar
- Added: `PlayerPrefs` delete button added to toolbar
- Added: Option to select Single/Additive scene load/unload to scene picker
- Added: All `IToolbarSettings` will be grouped with a foldout-toggle in Preferences

Editor/Toolbar/Tools/ToolPlayerPrefs.cs

@@ -0,0 +1,37 @@
+using JetBrains.Annotations;
+using UnityEditor;
+using UnityEngine;
+using UTools = UnityEditor.Tools;
+
+namespace Module.NavigationTool.Editor.Toolbar
+{
+    [UsedImplicitly]
+    internal sealed class ToolPlayerPrefs : AbstractToolbarDrawer
+    {
+        public override bool Visible => ToolbarPlayerPrefsSettings.IsPlayerPrefsEnabled;
+        public override bool Enabled => true;
+        public override EToolbarPlacement Placement => EToolbarPlacement.Right;
+        public override int Priority => (int)EToolbarPriority.Low;
+
+        private static readonly GUIContent LABEL_DELETE = new GUIContent(string.Empty, "Deletes all PlayerPrefs entries");
+
+        protected override void Draw(Rect rect)
+        {
+            bool isDeleteButtonPressed = GUI.Button(rect, styles.iconDisconnect, styles.button);
+            GUI.Label(rect, LABEL_DELETE, styles.labelCenter);
+
+            if (!isDeleteButtonPressed)
+                return;
+            if (!EditorUtility.DisplayDialog("Delete PlayerPrefs", "Are you sure you want to delete all PlayerPrefs data?", "Yes", "No"))
+                return;
+
+            PlayerPrefs.DeleteAll();
+            PlayerPrefs.Save();
+        }
+
+        public override float CalculateWidth()
+        {
+            return 24.0f;
+        }
+    }
+}