Use default property for widgets

src/gui/optionsdialog.ui

@@ -2673,14 +2673,7 @@ Disable encryption: Only connect to peers without protocol encryption</string>
               </property>
               <layout class="QGridLayout" name="gridLayout_16">
                <item row="0" column="0">
-                <widget class="QPlainTextEdit" name="textTrackers">
-                 <property name="enabled">
-                  <bool>true</bool>
-                 </property>
-                 <property name="focusPolicy">
-                  <enum>Qt::StrongFocus</enum>
-                 </property>
-                </widget>
+                <widget class="QPlainTextEdit" name="textTrackers"/>
                </item>
               </layout>
              </widget>