Revert screen by reading prefab from filesystem, closes #2

Runtime/Navigation/ScreenId.cs

@@ -1,4 +1,4 @@
 // Names are automatically added through ScreenIdGenerator.cs, deletions are done manually :)
 public enum ScreenId {
 	None = 0,
-}
+}

Runtime/Navigation/VioletScreen.cs

@@ -108,6 +108,7 @@ public void Update() {
 			EditorSceneManager.sceneSaved += EditorSceneManager_sceneSaved;
 		}
 
+		[SerializeField, HideInInspector]
 		string prefabPath = "";
 		UnityEngine.Object prefab;
 		public bool isEditing;
@@ -119,31 +120,24 @@ public void PackPrefab() {
 
 		public void RevertPrefab() {
 			Violet.Log($"Reverting. You will lose work!");
+
 			isEditing = false;
-			if (prefab != null) {
-				var revertedScreen = PrefabUtility.InstantiatePrefab(prefab, transform.parent) as GameObject;
-				revertedScreen.transform.SetSiblingIndex(gameObject.transform.GetSiblingIndex());
-				revertedScreen.SetActive(false);
-				DestroyImmediate(gameObject);
-			} else {
-				PackPrefab();
-				var path = string.IsNullOrEmpty(prefabPath) ? $"Assets/Menus/{name}.prefab" : prefabPath;
-				UnityEngine.Debug.LogWarning($"@null - reverting prefab shouldn't rely on git in case projects aren't using git");
-				var proc = new System.Diagnostics.Process() {
-					StartInfo = new System.Diagnostics.ProcessStartInfo() {
-						FileName = "git",
-						Arguments = $"checkout \"{path}\"",
-						UseShellExecute = false,
-						RedirectStandardOutput = true,
-						CreateNoWindow = true
-					}
-				};
-				proc.Start();
-				while (!proc.StandardOutput.EndOfStream) {
-					var line = proc.StandardOutput.ReadLine();
-					print($"line={line}");
+			if (string.IsNullOrEmpty(prefabPath)) {
+				throw new Exception($"Can't revert prefab for {gameObject.name} because prefabPath is null. Try saving and discarding changes in git.");
+			}
+
+			if (prefab == null) {
+				prefab = AssetDatabase.LoadAssetAtPath<VioletScreen>(prefabPath)?.gameObject;
+
+				if (prefab == null) {
+					throw new Exception($"Couldn't find prefab path={prefabPath}");
 				}
 			}
+
+			var revertedScreen = PrefabUtility.InstantiatePrefab(prefab, transform.parent) as GameObject;
+			revertedScreen.transform.SetSiblingIndex(gameObject.transform.GetSiblingIndex());
+			revertedScreen.SetActive(false);
+			DestroyImmediate(gameObject);
 		}
 
 		public void UnpackPrefab() {