tastudio: file opener improvements

- fix opening and conversion of a regular movie
- fancy ofn filter, suggesting all available files first

BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.MenuItems.cs

@@ -61,15 +61,21 @@ namespace BizHawk.Client.EmuHawk
 					filename = string.Empty;
 				}
 
-				var file = OpenFileDialog(
-					filename,
-					PathManager.MakeAbsolutePath(Global.Config.PathEntries.MoviesPathFragment, null),
-					"Tas Project Files",
-					"tasproj");
-
-				if (file != null)
+				// need to be fancy here, so call the ofd constructor directly instead of helper
+				var all = "*." + string.Join(";*.", MovieService.MovieExtensions.Reverse());
+				var ofd = new OpenFileDialog
 				{
-					LoadFile(file);
+					FileName = filename,
+					InitialDirectory = PathManager.MakeAbsolutePath(Global.Config.PathEntries.MoviesPathFragment, null),
+					Filter = string.Format(
+						"All Available Files ({0})|{0}|TAS Project Files (*.{1})|*.{1}|Movie Files (*.{2})|*.{2}|All Files|*.*",
+						all, TasMovie.Extension, MovieService.DefaultExtension)
+				};
+
+				var result = ofd.ShowHawkDialog();
+				if (result == DialogResult.OK)
+				{
+					LoadFile(new FileInfo(ofd.FileName));
 				}
 			}
 		}

BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.cs

@@ -626,13 +626,13 @@ namespace BizHawk.Client.EmuHawk
 					var result1 = MessageBox.Show("This is a regular movie, a new project must be created from it, in order to use in TAStudio\nProceed?", "Convert movie", MessageBoxButtons.OKCancel, MessageBoxIcon.Question);
 					if (result1 == DialogResult.OK)
 					{
+						StartNewMovieWrapper(false, movie);
 						ConvertCurrentMovieToTasproj();
+						SetUpColumns();
+						return true;
 					}
-					else
-					{
 					return false;
 				}
-				}
 				else 
 				{
 					MessageBox.Show("This is not a BizHawk movie!", "Movie load error", MessageBoxButtons.OK, MessageBoxIcon.Error);