diff --git a/qt-ui/maintab.ui b/qt-ui/maintab.ui
index 13121ab30..2f532c74b 100644
--- a/qt-ui/maintab.ui
+++ b/qt-ui/maintab.ui
@@ -583,22 +583,22 @@
           </layout>
          </widget>
         </item>
-	<item row="4" column="0">
-	 <spacer>
+        <item row="4" column="0">
+         <spacer>
           <property name="orientation">
            <enum>Qt::Vertical</enum>
           </property>
-	  <property name="sizeType">
-	   <enum>QSizePolicy::Expanding</enum>
-	  </property>
-	  <property name="sizeHint" stdset="0">
+          <property name="sizeType">
+           <enum>QSizePolicy::Expanding</enum>
+          </property>
+          <property name="sizeHint" stdset="0">
            <size>
             <width>20</width>
             <height>20</height>
            </size>
           </property>
-	 </spacer>
-       </item>
+         </spacer>
+        </item>
        </layout>
       </widget>
      </widget>
@@ -732,22 +732,22 @@
           </layout>
          </widget>
         </item>
-	<item row="2" column="0">
-	 <spacer>
+        <item row="2" column="0">
+         <spacer>
           <property name="orientation">
            <enum>Qt::Vertical</enum>
           </property>
-	  <property name="sizeType">
-	   <enum>QSizePolicy::Expanding</enum>
-	  </property>
-	  <property name="sizeHint" stdset="0">
+          <property name="sizeType">
+           <enum>QSizePolicy::Expanding</enum>
+          </property>
+          <property name="sizeHint" stdset="0">
            <size>
             <width>20</width>
             <height>20</height>
            </size>
           </property>
-	 </spacer>
-       </item>
+         </spacer>
+        </item>
        </layout>
        <zorder>groupBox_8b</zorder>
        <zorder>groupBox_4b</zorder>