Correct misleading "overridden options" label

Command-line options override values set in the configuration file and
configuration file options override values set in the GUI.

src/qt/forms/optionsdialog.ui

@@ -714,7 +714,7 @@
         <item>
          <widget class="QLabel" name="overriddenByCommandLineInfoLabel">
           <property name="text">
-           <string>Active command-line options that override above options:</string>
+           <string>Options set in this dialog are overridden by the command line or in the configuration file:</string>
           </property>
           <property name="textFormat">
            <enum>Qt::PlainText</enum>