[fix] fix qmdiarea scroll

Author: bgallois

src/fastanalyzer.ui

@@ -16,7 +16,14 @@
   <widget class="QWidget" name="centralwidget">
    <layout class="QGridLayout" name="gridLayout">
     <item row="0" column="0">
-     <widget class="QMdiArea" name="mdiArea"/>
+     <widget class="QMdiArea" name="mdiArea">
+      <property name="verticalScrollBarPolicy">
+       <enum>Qt::ScrollBarAlwaysOn</enum>
+      </property>
+      <property name="horizontalScrollBarPolicy">
+       <enum>Qt::ScrollBarAlwaysOn</enum>
+      </property>
+     </widget>
     </item>
    </layout>
   </widget>