message: [GUI][Trivial] Fix button size in welcomecontentwidget
diff: </property>
  <property name="maximumSize">
  <size>
  - <width>16777215</width>
  + <width>140</width>
  <height>1</height>
  </size>
  </property>
  </property>
  <property name="maximumSize">
  <size>
  - <width>16777215</width>
  + <width>140</width>
  <height>1</height>
  </size>
  </property>
  </property>
  <property name="maximumSize">
  <size>
  - <width>16777215</width>
  + <width>160</width>
  <height>1</height>
  </size>
  </property>
  </property>
  <property name="sizeHint" stdset="0">
  <size>
  - <width>40</width>
  + <width>20</width>
  <height>20</height>
  </size>
  </property>
  <widget class="QPushButton" name="pushName4">
  <property name="minimumSize">
  <size>
  - <width>110</width>
  + <width>150</width>
  <height>0</height>
  </size>
  </property>
  </property>
  <property name="sizeHint" stdset="0">
  <size>
  - <width>96</width>
  + <width>76</width>
  <height>20</height>
  </size>
  </property>
  