mac/qt: fix some refresh bugs in swap_dialog and new_channel_dialog

fixes #6269

this is just ugly :/

electrum/gui/qt/amountedit.py

@@ -112,6 +112,7 @@ class BTCAmountEdit(AmountEdit):
             self.setText(" ")  # Space forces repaint in case units changed
         else:
             self.setText(format_satoshis_plain(amount_sat, decimal_point=self.decimal_point()))
+        self.repaint()  # macOS hack for #6269
 
 
 class FeerateEdit(BTCAmountEdit):

electrum/gui/qt/channels_list.py

@@ -337,13 +337,19 @@ class ChannelsList(MyTreeView):
         max_button.setFixedWidth(100)
         max_button.setCheckable(True)
         suggest_button = QPushButton(d, text=_('Suggest'))
-        suggest_button.clicked.connect(lambda: remote_nodeid.setText(bh2u(lnworker.suggest_peer() or b'')))
+        def on_suggest():
+            remote_nodeid.setText(bh2u(lnworker.suggest_peer() or b''))
+            remote_nodeid.repaint()  # macOS hack for #6269
+        suggest_button.clicked.connect(on_suggest)
         clear_button = QPushButton(d, text=_('Clear'))
         def on_clear():
             amount_e.setText('')
             amount_e.setFrozen(False)
+            amount_e.repaint()  # macOS hack for #6269
             remote_nodeid.setText('')
+            remote_nodeid.repaint()  # macOS hack for #6269
             max_button.setChecked(False)
+            max_button.repaint()  # macOS hack for #6269
         clear_button.clicked.connect(on_clear)
         h = QGridLayout()
         h.addWidget(QLabel(_('Your Node ID')), 0, 0)

electrum/gui/qt/swap_dialog.py

@@ -163,10 +163,13 @@ class SwapDialog(WindowModalDialog):
     def update(self):
         sm = self.swap_manager
         self.send_button.setIcon(read_QIcon("lightning.png" if self.is_reverse else "bitcoin.png"))
+        self.send_button.repaint()  # macOS hack for #6269
         self.recv_button.setIcon(read_QIcon("lightning.png" if not self.is_reverse else "bitcoin.png"))
+        self.recv_button.repaint()  # macOS hack for #6269
         server_mining_fee = sm.lockup_fee if self.is_reverse else sm.normal_fee
         server_fee_str = '%.2f'%sm.percentage + '%  +  '  + self.window.format_amount(server_mining_fee) + ' ' + self.window.base_unit()
         self.server_fee_label.setText(server_fee_str)
+        self.server_fee_label.repaint()  # macOS hack for #6269
         self.update_fee()
 
     def update_fee(self):
@@ -185,6 +188,7 @@ class SwapDialog(WindowModalDialog):
             fee = self.tx.get_fee() if self.tx else None
         fee_text = self.window.format_amount(fee) + ' ' + self.window.base_unit() if fee else ''
         self.fee_label.setText(fee_text)
+        self.fee_label.repaint()  # macOS hack for #6269
 
     def run(self):
         self.window.run_coroutine_from_thread(self.swap_manager.get_pairs(), lambda x: self.update())