enhance: do NOT remember the last selected handling method of uncommitted local changes (#977)

Signed-off-by: leo <longshuang@msn.cn>

Author: love-linger

src/Models/RepositorySettings.cs

@@ -50,12 +50,6 @@ public bool IncludeUntrackedInLocalChanges
             set;
         } = true;
 
-        public DealWithLocalChanges DealWithLocalChangesOnCheckoutBranch
-        {
-            get;
-            set;
-        } = DealWithLocalChanges.DoNothing;
-
         public bool EnableForceOnFetch
         {
             get;
@@ -68,12 +62,6 @@ public bool FetchWithoutTags
             set;
         } = false;
 
-        public DealWithLocalChanges DealWithLocalChangesOnPull
-        {
-            get;
-            set;
-        } = DealWithLocalChanges.DoNothing;
-
         public bool PreferRebaseInsteadOfMerge
         {
             get;
@@ -116,12 +104,6 @@ public bool PushToRemoteWhenDeleteTag
             set;
         } = false;
 
-        public DealWithLocalChanges DealWithLocalChangesOnCreateBranch
-        {
-            get;
-            set;
-        } = DealWithLocalChanges.DoNothing;
-
         public bool CheckoutBranchOnCreateBranch
         {
             get;

src/ViewModels/Checkout.cs

@@ -11,9 +11,9 @@ public string Branch
 
         public Models.DealWithLocalChanges PreAction
         {
-            get => _repo.Settings.DealWithLocalChangesOnCheckoutBranch;
-            set => _repo.Settings.DealWithLocalChangesOnCheckoutBranch = value;
-        }
+            get;
+            set;
+        } = Models.DealWithLocalChanges.DoNothing;
 
         public Checkout(Repository repo, string branch)
         {

src/ViewModels/CreateBranch.cs

@@ -21,9 +21,9 @@ public object BasedOn
 
         public Models.DealWithLocalChanges PreAction
         {
-            get => _repo.Settings.DealWithLocalChangesOnCreateBranch;
-            set => _repo.Settings.DealWithLocalChangesOnCreateBranch = value;
-        }
+            get;
+            set;
+        } = Models.DealWithLocalChanges.DoNothing;
 
         public bool CheckoutAfterCreated
         {

src/ViewModels/Pull.cs

@@ -40,9 +40,9 @@ public Models.Branch SelectedBranch
 
         public Models.DealWithLocalChanges PreAction
         {
-            get => _repo.Settings.DealWithLocalChangesOnPull;
-            set => _repo.Settings.DealWithLocalChangesOnPull = value;
-        }
+            get;
+            set;
+        } = Models.DealWithLocalChanges.DoNothing;
 
         public bool UseRebase
         {