Fix the layout for the valgrind option page.

Remove the horizontal spacer preventing the page to resize itself.

Change-Id: Icd181d0ab177affa4d14c830b0bf61eb3f34f2b2
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/valgrind/valgrindconfigwidget.ui

@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>669</width>
+    <width>597</width>
     <height>312</height>
    </rect>
   </property>
@@ -31,7 +31,7 @@
        </widget>
       </item>
       <item>
-       <widget class="Utils::PathChooser" name="valgrindExeChooser">
+       <widget class="Utils::PathChooser" name="valgrindExeChooser" native="true">
         <property name="sizePolicy">
          <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
           <horstretch>1</horstretch>
@@ -43,19 +43,6 @@
      </layout>
     </widget>
    </item>
-   <item row="0" column="2">
-    <spacer name="horizontalSpacer_2">
-     <property name="orientation">
-      <enum>Qt::Horizontal</enum>
-     </property>
-     <property name="sizeHint" stdset="0">
-      <size>
-       <width>197</width>
-       <height>1</height>
-      </size>
-     </property>
-    </spacer>
-   </item>
    <item row="1" column="0">
     <widget class="QGroupBox" name="memcheckOptions">
      <property name="sizePolicy">