Unmatched subframes should be blockable

[piroor]

Describe the bug

By the change of #22, subframes are now redirectable. However someone want another behavior explicitly: blocking of subframes. Another issue #25 can be the blocker.

To Reproduce

1. Start ThinBridgeSetting.exe
2. Go to the "URLリダイレクト全般設定" section.
3. Uncheck "アドレスバーに表示されるURLのみを判定する"
4. Go to the "その他（未定義URL）" section.
5. There is no way to block loading in subframes.

Expected behavior

• There should be a new selectbox or radiobuttons like "サブフレームの読み込み：リダイレクトする/リダイレクトせず、現在のブラウザーで読み込む/リダイレクトせず、読み込みをブロックする"
• Loadings in subframes should be blocked, if the URL does not any existing URL rule and "リダイレクトせず、読み込みをブロックする" is chosen.

Your Environment

- ThinBridge version: N/A (feature request)

Your Configuration

N/A (feature request)

Your TRACE log (IE)

N/A (feature request)

Additional context

No response