Allow HTML rendering in Prettyblock Title headings

[CySSoO]

Motivation

• Allow authors to include inline HTML (for example <span>) inside Prettyblock titles so H1–H6 headings can contain formatted fragments while keeping the same back-office input field and settings.

Description

• Replaced the escaped title output with raw Smarty output in views/templates/hook/prettyblocks/prettyblock_heading.tpl by changing {$block.settings.title|escape:'htmlall':'UTF-8'} to {$block.settings.title nofilter} to allow HTML rendering inside the heading element.

Testing

• Ran git diff -- views/templates/hook/prettyblocks/prettyblock_heading.tpl to confirm the exact template change and it succeeded.
• Inspected the updated file content with nl -ba views/templates/hook/prettyblocks/prettyblock_heading.tpl | sed -n '30,50p' to verify the new nofilter usage and it succeeded.
• No automated unit tests were modified by this change.

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Codex Task