Reorder XML .ui files to correct tab orders for plugin config dialogs

[isf63]

Some fixes to lxqt-panel plugins config dialogs

Affected files:
plugin-mainmenu/lxqtmainmenuconfiguration.ui
plugin-networkmonitor/lxqtnetworkmonitorconfiguration.ui plugin-sensors/lxqtsensorsconfiguration.ui
plugin-spacer/spacerconfiguration.ui

[tsujan]

Mostly good, but please also take care of the following blocks in lxqtsensorsconfiguration.ui:

       <item row="4" column="0">
        <widget class="QComboBox" name="detectedChipsCB">
         <property name="currentIndex">
          <number>-1</number>
         </property>
         <property name="frame">
          <bool>true</bool>
         </property>
        </widget>
       </item>
       <item row="3" column="0">
        <widget class="QLabel" name="detectedChipsL">
         <property name="text">
          <string>Detected chips:</string>
         </property>
        </widget>
       </item>

And also these blocks in spacerconfiguration.ui:

   <item row="0" column="2">
    <widget class="QSpinBox" name="sizeSB">
     <property name="minimum">
      <number>4</number>
     </property>
     <property name="maximum">
      <number>2048</number>
     </property>
     <property name="value">
      <number>8</number>
     </property>
    </widget>
   </item>
   <item row="0" column="1">
    <widget class="QRadioButton" name="sizeFixedRB">
     <property name="text">
      <string>fixed</string>
     </property>
    </widget>
   </item>

[tsujan]

Thanks.