Embedded Text Document isn't correctly saved when saving FC file

[0penBrain]

Is there an existing issue for this?

• I have searched the existing issues

Problem description

Steps to reproduce:

• Create a new document
• Add an embedded Text Document
• Save the file to reset the modified state
• Enter some text in the Document Text editor
• Go to the file 3D view tab
• Save the file => ⚠️ The modified state indicator * has been reset on the Text Document editor tab (as if it was saved), but if you try to close the file, you'll get an "unsaved file" notification. If you choose "discard" at this moment, the text in the Text Document won't actually be saved.

You can try using a SpreadSheet instead of the Text Document to see difference.

Full version info

OS: Ubuntu 22.04.4 LTS (KDE/plasma)
Word size of FreeCAD: 64-bit
Version: 0.22.0dev.37076 (Git)
Build type: Debug
Branch: master
Hash: 02df1c86b70b155886e64a4ad7f944ed9cd3582d
Python 3.10.12, Qt 5.15.3, Coin 4.0.0, Vtk 7.1.1, OCC 7.6.3
Locale: English/United States (en_US)

Subproject(s) affected?

Core

Anything else?

No response

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