fix expert button height on windows

gui/KCC.ui

@@ -1127,6 +1127,12 @@ Keeping this file may crash some readers like the Kobo native CBZ reader.</strin
        </item>
        <item row="0" column="4">
         <widget class="QPushButton" name="expertButton">
+         <property name="minimumSize">
+          <size>
+           <width>0</width>
+           <height>30</height>
+          </size>
+         </property>
          <property name="toolTip">
           <string>Toggle Easy/Expert Mode</string>
          </property>