simplify fee preferences dialog

gui/qt/main_window.py

@@ -2626,23 +2626,15 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, PrintError):
         )
         fee_type_label = HelpLabel(_('Fee estimation') + ':', msg)
         fee_type_combo = QComboBox()
-        fee_type_combo.addItems([_('Time based'), _('Mempool based')])
+        fee_type_combo.addItems([_('Static'), _('ETA'), _('Mempool')])
         fee_type_combo.setCurrentIndex(1 if self.config.use_mempool_fees() else 0)
         def on_fee_type(x):
-            self.config.set_key('mempool_fees', x==1)
+            self.config.set_key('mempool_fees', x==2)
+            self.config.set_key('dynamic_fees', x>0)
             self.fee_slider.update()
         fee_type_combo.currentIndexChanged.connect(on_fee_type)
         fee_widgets.append((fee_type_label, fee_type_combo))
 
-        def on_dynfee(x):
-            self.config.set_key('dynamic_fees', x == Qt.Checked)
-            self.fee_slider.update()
-        dynfee_cb = QCheckBox(_('Use dynamic fees'))
-        dynfee_cb.setChecked(self.config.is_dynfee())
-        dynfee_cb.setToolTip(_("Use fees recommended by the server."))
-        fee_widgets.append((dynfee_cb, None))
-        dynfee_cb.stateChanged.connect(on_dynfee)
-
         feebox_cb = QCheckBox(_('Edit fees manually'))
         feebox_cb.setChecked(self.config.get('show_fee', False))
         feebox_cb.setToolTip(_("Show fee edit box in send tab."))