set custom button height on win32

ankiqt/ui/main.py

@@ -119,6 +119,8 @@ class AnkiQt(QMainWindow):
         self.mainWin.noticeFrame.setShown(False)
         self.connect(self.mainWin.noticeButton, SIGNAL("clicked()"),
                      lambda: self.mainWin.noticeFrame.setShown(False))
+        if sys.platform.startswith("win32"):
+            self.mainWin.noticeButton.setFixedWidth(24)
 
     def setNotice(self, str):
         self.mainWin.noticeLabel.setText(str)

designer/main.ui

@@ -529,6 +529,12 @@
               <verstretch>0</verstretch>
              </sizepolicy>
             </property>
+            <property name="maximumSize">
+             <size>
+              <width>25</width>
+              <height>16777215</height>
+             </size>
+            </property>
             <property name="text">
              <string>X</string>
             </property>