Add an information blurb option to PromptWindow.

- PromptWindow now takes a parameter which contains optional
  informational text to display above the text control.

- Adjust callers.

src/kits/shared/PromptWindow.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012, Rene Gollent, [email protected].
+ * Copyright 2012-2013, Rene Gollent, [email protected].
  * Distributed under the terms of the MIT License.
  */
 #include "PromptWindow.h"
@@ -7,6 +7,7 @@
 #include <Button.h>
 #include <Catalog.h>
 #include <LayoutBuilder.h>
+#include <StringView.h>
 #include <TextControl.h>
 
 
@@ -14,13 +15,14 @@ static const uint32 kAcceptInput = 'acin';
 
 
 PromptWindow::PromptWindow(const char* title, const char* label,
-	BMessenger target, BMessage* message)
+	const char* info, BMessenger target, BMessage* message)
 	:
 	BWindow(BRect(), title, B_FLOATING_WINDOW, B_NOT_RESIZABLE
 			| B_NOT_ZOOMABLE | B_AUTO_UPDATE_SIZE_LIMITS | B_CLOSE_ON_ESCAPE),
 	fTarget(target),
 	fMessage(message)
 {
+	fInfoView = new BStringView("info", info);
 	fTextControl = new BTextControl("promptcontrol", label, NULL,
 		new BMessage(kAcceptInput));
 	BButton* cancelButton = new BButton("Cancel", new
@@ -28,11 +30,15 @@ PromptWindow::PromptWindow(const char* title, const char* label,
 	BButton* acceptButton = new BButton("Accept", new
 		BMessage(kAcceptInput));
 	BLayoutBuilder::Group<>(this, B_VERTICAL)
+		.Add(fInfoView)
 		.Add(fTextControl)
 		.AddGroup(B_HORIZONTAL)
 			.Add(acceptButton)
 			.Add(cancelButton);
 
+	if (info == NULL)
+		fInfoView->Hide();
+
 	fTextControl->TextView()->SetExplicitMinSize(BSize(
 			fTextControl->TextView()->StringWidth("1234567890"), B_SIZE_UNSET));
 	fTextControl->SetTarget(this);