Revert "qt: fix ReceiveWidget layout (fixes #9049)"

This reverts commit 21ffe32157.

This layout is difficult to get right. Both the old and the new layout are somewhat buggy.
Reverting this only on the 4.5.x release branch. We can improve it on master.
The old layout has been out there in releases for many months, so it is safer to just use
that in the release branch for now.

electrum/gui/qt/receive_tab.py

@@ -92,7 +92,6 @@ class ReceiveTab(QWidget, MessageBoxMixin, Logger):
         self.receive_help_text = WWLabel('')
         self.receive_rebalance_button = QPushButton('Rebalance')
         self.receive_rebalance_button.suggestion = None
-
         def on_receive_rebalance():
             if self.receive_rebalance_button.suggestion:
                 chan1, chan2, delta = self.receive_rebalance_button.suggestion
@@ -100,7 +99,6 @@ class ReceiveTab(QWidget, MessageBoxMixin, Logger):
         self.receive_rebalance_button.clicked.connect(on_receive_rebalance)
         self.receive_swap_button = QPushButton('Swap')
         self.receive_swap_button.suggestion = None
-
         def on_receive_swap():
             if self.receive_swap_button.suggestion:
                 chan, swap_recv_amount_sat = self.receive_swap_button.suggestion
@@ -162,7 +160,7 @@ class ReceiveTab(QWidget, MessageBoxMixin, Logger):
         hbox = QHBoxLayout()
         hbox.addLayout(vbox_g)
         hbox.addStretch()
-        hbox.addWidget(self.receive_widget, 1)
+        hbox.addWidget(self.receive_widget)
 
         self.searchable_list = self.request_list
         vbox = QVBoxLayout(self)
@@ -365,6 +363,7 @@ class ReceiveTab(QWidget, MessageBoxMixin, Logger):
         self.request_list.clearSelection()
 
 
+
 class ReceiveWidget(QWidget):
     min_size = QSize(200, 200)
 
@@ -374,6 +373,8 @@ class ReceiveWidget(QWidget):
         self.qr = qr
         self.help_widget = help_widget
         self.setMinimumSize(self.min_size)
+        for w in [textedit, qr, help_widget]:
+            w.setMinimumSize(self.min_size)
 
         for w in [textedit, qr]:
             w.mousePressEvent = receive_tab.do_copy
@@ -383,18 +384,12 @@ class ReceiveWidget(QWidget):
         if isinstance(help_widget, QLabel):
             help_widget.setFrameStyle(QFrame.StyledPanel)
             help_widget.setStyleSheet("QLabel {border:1px solid gray; border-radius:2px; }")
-
         hbox = QHBoxLayout()
-        hbox.addStretch()
+        hbox.setContentsMargins(0, 0, 0, 0)
         hbox.addWidget(textedit)
         hbox.addWidget(help_widget)
         hbox.addWidget(qr)
-
-        vbox = QVBoxLayout()
-        vbox.addLayout(hbox)
-        vbox.addStretch()
-
-        self.setLayout(vbox)
+        self.setLayout(hbox)
 
     def update_visibility(self, is_qr):
         if str(self.textedit.toPlainText()):
@@ -409,14 +404,10 @@ class ReceiveWidget(QWidget):
     def resizeEvent(self, e):
         # keep square aspect ratio when resized
         size = e.size()
-        margin = 10
-        x = min(size.height(), size.width()) - margin
-        for w in [self.textedit, self.qr, self.help_widget]:
-            w.setFixedWidth(x)
-            w.setFixedHeight(x)
+        w = size.height()
+        self.setFixedWidth(w)
         return super().resizeEvent(e)
 
-
 class FramedWidget(QFrame):
     def __init__(self):
         QFrame.__init__(self)