Do not change the font when overwriting existing text

[probonopd]

Selecting text (here I am using Ctrl-A to select all text) and typing new text should not change the formatting of the text, even if the formatting was applied not to the whole text box but rather just to the text inside it:

[probonopd]

If the formatting was applied to the whole frame rather to the text inside it, then it behaves well:

However, even in this case it does not work correctly when using Python to replace the text:

from scribus import *
setText("Hello", "Text1")

results in the wrong formatting, even in this case.

[aoloe]

This is a bigger issue that probably needs a new definition of how formatting is applied to frames and text.
This is the source of several bugs.

[aoloe]

remove the text formatting part for the text tool in the document settings
https://bugs.scribus.net/view.php?id=14949