FileTypes: disallow directories only where it makes sense.

Better fix for #8805.

src/preferences/filetypes/FileTypeWindow.cpp

@@ -360,6 +360,7 @@ FileTypeWindow::MessageReceived(BMessage* message)
 			panel.AddString("title", B_TRANSLATE("Select same type as"));
 			panel.AddInt32("message", kMsgSameTypeAsOpened);
 			panel.AddMessenger("target", this);
+			panel.AddBool("allowDirs", true);
 
 			be_app_messenger.SendMessage(&panel);
 			break;
@@ -404,6 +405,7 @@ FileTypeWindow::MessageReceived(BMessage* message)
 				B_TRANSLATE("Select same preferred application as"));
 			panel.AddInt32("message", kMsgSamePreferredAppAsOpened);
 			panel.AddMessenger("target", this);
+			panel.AddBool("allowDirs", true);
 
 			be_app_messenger.SendMessage(&panel);
 			break;

src/preferences/filetypes/FileTypes.cpp

@@ -385,6 +385,12 @@ FileTypes::MessageReceived(BMessage* message)
 				title.Append(subTitle);
 			}
 
+			uint32 flavors = B_FILE_NODE;
+			if (message->FindBool("allowDirs"))
+				flavors |= B_DIRECTORY_NODE;
+			fFilePanel->SetNodeFlavors(flavors);
+
+
 			fFilePanel->SetMessage(new BMessage(what));
 			fFilePanel->Window()->SetTitle(title.String());
 			fFilePanel->SetTarget(target);

src/preferences/filetypes/FileTypesWindow.cpp

@@ -826,6 +826,7 @@ FileTypesWindow::MessageReceived(BMessage* message)
 				B_TRANSLATE("Select same preferred application as"));
 			panel.AddInt32("message", kMsgSamePreferredAppAsOpened);
 			panel.AddMessenger("target", this);
+			panel.AddBool("allowDirs", true);
 
 			be_app_messenger.SendMessage(&panel);
 			break;