Pasting formatted content into text field while editing removes formatting

[barklund]

Bug Description

The current removal of formatting is intentional, as formatting would not otherwise be correctly converted to our new custom styles - but would rather use DraftJS built-in default styles, which would only cause confusion as those are not fully supported any longer.

Fixing this involves creating a custom handlePastedText callback.

This is a known consequence of PR #1323.

Expected Behaviour

• When pasting formatted content (content with special font weight, color, font style, text decoration or letter spacing), the original styling should be preserved and appear identical in the editor.

Steps to Reproduce

• Create a new Google Docs document.
• Insert some text here, make some of it bold, some italic, some underline and some green.
• Mark all the text and copy it to the system placeholder.
• In the editor, insert a new text field
• Click the text field to enter edit mode.
• Paste the copied content.
• Observe that the copied content is inserted, but without any formatting.

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Acceptance Criteria

QA Instructions

[csossi]

Verified in QA