Fix path to extension installation and other small issues

Author: shana

src/GitHub.Api/Application/ApplicationManagerBase.cs

@@ -201,11 +201,11 @@ protected void SetupMetrics(string unityVersion, bool firstRun)
         /// <param name="octorunScriptPath"></param>
         private void InitializeEnvironment(NPath gitExecutablePath)
         {
+            isBusy = false;
             SetupMetrics();
 
             if (!gitExecutablePath.IsInitialized)
             {
-                isBusy = false;
                 return;
             }
 

src/UnityExtension/Assets/Editor/GitHub.Unity/ApplicationCache.cs

@@ -87,7 +87,7 @@ private NPath DetermineInstallationPath()
             // Juggling to find out where we got installed
             var shim = CreateInstance<RunLocationShim>();
             var script = MonoScript.FromScriptableObject(shim);
-            var scriptPath = AssetDatabase.GetAssetPath(script).ToNPath();
+            var scriptPath = Application.dataPath.ToNPath().Parent.Combine(AssetDatabase.GetAssetPath(script).ToNPath());
             DestroyImmediate(shim);
             return scriptPath.Parent;
         }

src/UnityExtension/Assets/Editor/GitHub.Unity/UI/Subview.cs

@@ -61,7 +61,7 @@ public virtual void Finish(bool result)
         public bool HasFocus { get { return Parent != null && Parent.HasFocus; } }
         public virtual bool IsBusy
         {
-            get { return Manager.IsBusy || Repository != null ? Repository.IsBusy : false; }
+            get { return (Manager != null && Manager.IsBusy) || (Repository != null && Repository.IsBusy); }
         }
 
         protected ITaskManager TaskManager { get { return Manager.TaskManager; } }