errordialog: adequate text insertion

src/widgets/errordialog.py

@@ -19,9 +19,8 @@ class ErrorDialog(Adw.Dialog):
         self.gh_button.connect("activated", self.on_gh_clicked)
 
     def append_log(self, text):
-        GLib.idle_add(self.textbuffer.insert_at_cursor, text)
-        GLib.idle_add(self.textview.scroll_to_mark,
-                      self.textbuffer.get_insert(), 0, False, 0.0, 1.0)
+        self.textbuffer.set_text(text)
+        self.textview.scroll_to_mark(self.textbuffer.get_insert(), 0, False, 0.0, 1.0)  # Прокручиваем к курсору
 
     def present_error(self, win, error):
         self.error = None