Keep Hop Web Help button icon aligned with OK/Cancel

[leehaut]

Summary

• In Hop Web (RAP), dialog Help buttons were taller than the text-only OK/Cancel row because RAP sizes PUSH buttons to the zoomed help bitmap plus theme padding. Native Hop GUI already fits the 16px icon in platform chrome.
• Keep the question-mark icon on Web: request a pre-zoom size so the bitmap lands at 16px, apply a compact helpButton RAP variant (padding: 4px 12px), and lock FormData.height to the text-only preferred height.
• Desktop Help buttons are unchanged. NotePadDialog now uses the same HelpUtils.applyHelpButtonImage helper.