Only kick off project pref loading when the project changes

Author: dangoor

src/project/ProjectManager.js

@@ -1142,10 +1142,14 @@ define(function (require, exports, module) {
                 var rootEntry = FileSystem.getDirectoryForPath(rootPath);
                 rootEntry.exists(function (err, exists) {
                     if (exists) {
-                        PreferencesManager._setCurrentEditingFile(rootPath);
                         var projectRootChanged = (!_projectRoot || !rootEntry) ||
                             _projectRoot.fullPath !== rootEntry.fullPath;
                         var i;
+                        
+                        if (projectRootChanged) {
+                            PreferencesManager._setCurrentEditingFile(rootPath);
+                        }
+
 
                         // Success!
                         var perfTimerName = PerfUtils.markStart("Load Project: " + rootPath);