[view.qt.prepare] fix: initialization panel's lower components positioning

CHANGELOG.md

@@ -38,6 +38,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
   - crashing when resizing with floats instead of integers [#216](https://github.com/vinifmor/bauh/issues/216)
   - crashing when using floats for spinner components [#217](https://github.com/vinifmor/bauh/issues/217)
   - crashing for custom actions that can request a system backup (e.g: Arch -> Quick system upgrade)
+  - initialization panel's lower components positioning
 
 ## [0.9.23] 2021-12-10
 ### Features

bauh/view/qt/prepare.py

@@ -230,7 +230,7 @@ class PreparePanel(QWidget, TaskManager):
         self.layout().addWidget(self.bottom_widget)
         self.bottom_widget.setVisible(False)
 
-        self.bt_bar = QCustomToolbar()
+        self.bt_bar = QCustomToolbar(policy_height=QSizePolicy.Fixed)
         self.bt_close = QPushButton(self.i18n['close'].capitalize())
         self.bt_close.setObjectName('bt_cancel')
         self.bt_close.setCursor(QCursor(Qt.PointingHandCursor))