Merge pull request #3197 from DelazJ/patch-9

fix button label

Author: nyalldawson

src/ui/qgscustomizationdialogbase.ui

@@ -151,7 +151,7 @@
      <normaloff>:/images/themes/default/mActionSelectAllTree.svg</normaloff>:/images/themes/default/mActionSelectAllTree.svg</iconset>
    </property>
    <property name="text">
-    <string>Select All</string>
+    <string>Check All</string>
    </property>
   </action>
  </widget>