Fixed exception from forum-9214 (but hung build still not fixed).

Fixed string resource name in App.Config description.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/3.0@3884 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

data/templates/file/Misc/AppConfigFile.xft

@@ -7,7 +7,7 @@
 		  defaultname	= "app.config"
 		  language	= "XML"/>
 	 
-	<Description>${res:Templates.File.Xml.AppConfigFile.Description}</Description>
+	<Description>${res:Templates.File.Xml.AppConfig.Description}</Description>
 
 	<Files>
 		<File name="${FullName}" language="XML"><![CDATA[<?xml version="1.0" encoding="utf-8" ?>

src/Main/Base/Project/Src/Project/BuildEngine.cs

@@ -531,7 +531,7 @@ namespace ICSharpCode.SharpDevelop.Project
 				combinedBuildFeedbackSink.Done(results.Result == BuildResultCode.Success);
 			}
 			if (options.Callback != null) {
-				Gui.WorkbenchSingleton.MainForm.BeginInvoke(options.Callback, results);
+				Gui.WorkbenchSingleton.SafeThreadAsyncCall(r => options.Callback(r), results);
 			}
 		}
 		#endregion