feat(reconnect): Made `Reconnect` button wider

After #3457 `Reconnect` button was moved on `Advanced` tab. It can be
harder to find it (#3662). So it made wider.

src/widget/form/settings/advancedsettings.ui

@@ -162,19 +162,6 @@
           </item>
           <item>
            <layout class="QHBoxLayout" name="horizontalLayout_4">
-            <item>
-             <spacer name="horizontalSpacer_4">
-              <property name="orientation">
-               <enum>Qt::Horizontal</enum>
-              </property>
-              <property name="sizeHint" stdset="0">
-               <size>
-                <width>40</width>
-                <height>20</height>
-               </size>
-              </property>
-             </spacer>
-            </item>
             <item>
              <widget class="QPushButton" name="reconnectButton">
               <property name="text">