add options help to linked monitors option (#2633)

* add options help to linked monitors option

* fix typo and clarify instructions for new widget

web/lang/en_gb.php

@@ -1016,6 +1016,17 @@ $OLANG = array(
       for new images. In this case, it is safe to use the field.
       '
 	),
+	'OPTIONS_LINKED_MONITORS' => array(
+    'Help' => '
+      This field allows you to select other monitors on your system that act as 
+      triggers for this monitor. So if you have a camera covering one aspect of 
+      your property you can force all cameras to record while that camera 
+      detects motion or other events. Click on ‘Select’ to choose linked monitors. 
+      Be very careful not to create circular dependencies with this feature 
+      because you will have infinitely persisting alarms which is almost 
+      certainly not what you want! To unlink monitors you can ctrl-click.
+      '
+	),
 
 //    'LANG_DEFAULT' => array(
 //        'Prompt' => "This is a new prompt for this option",

web/skins/classic/views/monitor.php

@@ -716,7 +716,7 @@ switch ( $tab ) {
       if ( $monitor->Type != 'WebSite' ) {
 ?>
         <tr>
-          <td><?php echo translate('LinkedMonitors') ?></td>
+          <td><?php echo translate('LinkedMonitors') ?>&nbsp;(<?php echo makePopupLink('?view=optionhelp&amp;option=OPTIONS_LINKED_MONITORS', 'zmOptionHelp', 'optionhelp', '?' ) ?>)</td>
           <td>
             <select name="monitorIds" class="chosen" multiple="multiple" onchange="updateLinkedMonitors( this )">
 <?php