LCLTaskDialog prevent \n conversion to LF

Original Reporter info from Mantis: zamtmn @zamtmn

• Reporter name: Andrey Zubarev

Description:

here https://forum.lazarus.freepascal.org/index.php/topic,53884.0.html
Attached path add escaped \ processing

Mantis conversion info:

• Mantis ID: 38676
• Fixed in version: 2.2
• Fixed in revision: 64975 (#058e8264)
• Target version: 2.2