feature: remember last active tab index if restore tabs is enabled

src/ViewModels/Launcher.cs

@@ -30,6 +30,11 @@ namespace SourceGit.ViewModels {
 
                     OpenRepositoryInTab(node, null);
                 }
+
+                var lastActiveIdx = Preference.Instance.LastActiveTabIdx;
+                if (lastActiveIdx >= 0 && lastActiveIdx < Pages.Count) {
+                    ActivePage = Pages[lastActiveIdx];
+                }
             }
         }
 
@@ -42,6 +47,7 @@ namespace SourceGit.ViewModels {
                 }
             }
 
+            Preference.Instance.LastActiveTabIdx = Pages.IndexOf(ActivePage);
             Preference.Save();
         }
 

src/ViewModels/Preference.cs

@@ -178,6 +178,11 @@ namespace SourceGit.ViewModels {
             set;
         } = new List<string>();
 
+        public int LastActiveTabIdx {
+            get;
+            set;
+        } = 0;
+
         public static void AddNode(RepositoryNode node, RepositoryNode to = null) {
             var collection = to == null ? _instance._repositoryNodes : to.SubNodes;
             var list = new List<RepositoryNode>();