Qt: fix typo

Close #6619

modules/gui/qt4/ui/sprefs_interface.ui

@@ -36,9 +36,6 @@
       <string>Instances</string>
      </property>
      <layout class="QGridLayout" name="gridLayout_2">
-      <property name="verticalSpacing">
-       <number>0</number>
-      </property>
       <property name="leftMargin">
        <number>9</number>
       </property>
@@ -48,6 +45,9 @@
       <property name="bottomMargin">
        <number>9</number>
       </property>
+      <property name="verticalSpacing">
+       <number>0</number>
+      </property>
       <item row="0" column="0">
        <widget class="QCheckBox" name="OneInterfaceMode">
         <property name="text">
@@ -535,7 +535,7 @@
              <item row="5" column="0" colspan="2">
               <widget class="QLabel" name="notificationComboLabel">
                <property name="text">
-                <string>Show media change popup when</string>
+                <string>Show media change popup:</string>
                </property>
               </widget>
              </item>