How to change GNOME app preferences for root?

Opening the apps such as Gedit or Gnome Text Editor with sudo in Terminal, will open the app with default preferences and furthermore it won’t let me change those settings; however as an administrative user I have changed various preferences that seem to be ignored.

Here’s a screenshot for comparison: root vs. user

When trying to change the preferences after opening the app with sudo, I get the following error/warning in Terminal (in which tedit is a symbolic link to gnome-text-editor):

(tedit:37067): dconf-WARNING **: 11:36:56.149: failed to commit changes to dconf: Error spawning command line “dbus-launch --autolaunch=cca92021290f49f5b00d396a 

So, is there a way to change preferences for root to be followed when opening the app with root privileges?

I tried the following with no success:

1. Logging in as root with su root and then opening the app;
2. Opning the app using gksu;
3. Editing the default parameters of gsettings schema for the specific app in /usr/share/glib-2.0/schemas/org.gnome.TextEditor.gschema.xml;
4. Opening the directory /usr/share/applications as administrator and then launch the app using .desktop files.

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Edit 1

I just found out the option sudo -E as a workaround to open a file with root but in my user environment, for examle:

sudo -E gnome-text-editor [path-to-file] 

But I’m still eager to know if there’s a straightforward method to change root preferences permanently.

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Edit 2

I found out accidentally that the foremenitoned method (3), i.e. changing schema’s default values, does work but you need to recompile them with:

sudo glib-compile-schemas /usr/share/glib-2.0/schemas/ 

Yet I consider this as another workaround, not a real answer.