What this PR does

This pull request adds an Exit button to exit the Survey Preview Mode, addressing the issue where users currently have no clear way to exit preview mode and return back to editing mode.

Fixes #6166

Changes:

• Added an "Exit Preview Mode" button at the bottom of the preview page.
• Positioned the button alongside the "Preview Mode" label for visibility.

Steps to Test:

• Navigate to the survey page (/survey).
• Click "Edit Survey" to open the editor.
• Click "Preview Survey" to enter preview mode.
• The "Exit Preview Mode" button appears at the bottom.
• Click the button and it returns you back to the editing mode.

Impact:

Provides a clear way for users to exit preview mode and return back to the editing mode.

Screenshots

Before:

After: