title: Qt change MainWindow geometry
body: <p>I want to change the size of the MainWindow. If I change the geometry of my Mainwindow to for instance 947 x 504, it is still smaller. Even if I change it a few more times and save the ui data file, it won't change. I am using Qt 5.1.0.</p>
  
  <p>XML Code from <strong>mainwindow.ui</strong></p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;ui version="4.0"&gt;
   &lt;class&gt;MainWindow&lt;/class&gt;
   &lt;widget class="QMainWindow" name="MainWindow"&gt;
    &lt;property name="enabled"&gt;
     &lt;bool&gt;true&lt;/bool&gt;
    &lt;/property&gt;
    &lt;property name="geometry"&gt;
     &lt;rect&gt;
      &lt;x&gt;0&lt;/x&gt;
      &lt;y&gt;0&lt;/y&gt;
      &lt;width&gt;947&lt;/width&gt;
      &lt;height&gt;504&lt;/height&gt;
     &lt;/rect&gt;
    &lt;/property&gt;
    &lt;property name="windowTitle"&gt;
     &lt;string&gt;SpeedReader [BETA]&lt;/string&gt;
    &lt;/property&gt;
    &lt;widget class="QWidget" name="centralWidget"/&gt;
    &lt;widget class="QMenuBar" name="menuBar"&gt;
     &lt;property name="geometry"&gt;
      &lt;rect&gt;
       &lt;x&gt;0&lt;/x&gt;
       &lt;y&gt;0&lt;/y&gt;
       &lt;width&gt;947&lt;/width&gt;
       &lt;height&gt;21&lt;/height&gt;
      &lt;/rect&gt;
     &lt;/property&gt;
  </code></pre>