Update MarkdownPlusHelper.php

[colonelpopcorn]

This allows us to override functionality at our pace. This should be relatively safe since Kanboard is in maintenance mode.

[colonelpopcorn]

@creecros Could I get a review on this PR, any concerns with extending the original helper?

[creecros]

When i get a moment I will.

[RainerBielefeld]

I did some first tests with new MarkdownPlusHelper.php, heals the comments problem, until now no bad interactions seen.

My Configuration (KANBOARD installation for testing)

• Application version: 1.2.36

• PHP version: 8.3.6

• PHP SAPI: fpm-fcgi

• HTTP Client: cURL

• OS version: Linux 5.4.0-181-generic

• Database driver: mysql

• Database version: 10.5.23-MariaDB-1:10.5.23+maria~ubu2004-log

• Browser: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:117.0a) Gecko/20100101 SeaMonkey/2.53.18, Build 20240329110002

• Profile Language: English

• Plugins:

  • Wiki 0.3.3a by Alfred
  • MarkdownPlus with modfied MarkdownPlusHelper.php (by colonelpopcorn 2024-05-20)

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I will do more tests with full Plugins set, soon.