glib2-branding-openSUSE: make plain text files open in gedit

This update fixes an issue where clicking on a text file would open
LibreOffice instead of just the lightweight gedit, as the
gedit desktop file got renamed to org.gnome.gedit.desktop.

Fixed bugs
bnc#904010
Some plain text files (e.g. NEWS, ChangeLog) open in LibreOffice Writer instead of GEdit
Selected Binaries
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