if there is a placeholder set the textproperties to that instead to the normal text

Description

Reason: Because the placeholder text is the base for the text and from that the text is generated. When setting the properties to text they get overwritten afterwards. For example in the infoelement

Conformity

• Changelog entry
• Unit tests
• Update INSTALL
• Downport
• Fixes: #666 (closed) second part

When external dependencies are removed

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