Adjusted the layout of elements in the audio section

resources/preferences.ui

@@ -1469,9 +1469,6 @@
              <property name="orientation">
               <enum>Qt::Vertical</enum>
              </property>
-             <property name="sizeType">
-              <enum>QSizePolicy::Expanding</enum>
-             </property>
              <property name="sizeHint" stdset="0">
               <size>
                <width>20</width>
@@ -1605,7 +1602,7 @@
            <item>
             <widget class="QListWidget" name="audio_codecs_list">
              <property name="sizePolicy">
-              <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
+              <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
                <horstretch>0</horstretch>
                <verstretch>0</verstretch>
               </sizepolicy>
@@ -1684,6 +1681,19 @@
              </property>
             </widget>
            </item>
+           <item>
+            <spacer name="audio_codecs_spacer">
+             <property name="orientation">
+              <enum>Qt::Vertical</enum>
+             </property>
+             <property name="sizeHint" stdset="0">
+              <size>
+               <width>20</width>
+               <height>20</height>
+              </size>
+             </property>
+            </spacer>
+           </item>
           </layout>
          </widget>
         </item>