web: check sch_last existence (#2050)

code/html/custom.js

@@ -1075,10 +1075,14 @@ function initRelayConfig(data) {
         $("select[name='relayBoot']", line).val(data.boot[i]);
         $("select[name='relayPulse']", line).val(data.pulse[i]);
         $("input[name='relayTime']", line).val(data.pulse_time[i]);
-        $("input[name='relayLastSch']", line).prop('checked', data.sch_last[i]);
-        $("input[name='relayLastSch']", line).attr("id", "relayLastSch" + i);
-        $("input[name='relayLastSch']", line).attr("name", "relayLastSch" + i);
-        $("input[name='relayLastSch" + i + "']", line).next().attr("for","relayLastSch" + (i));
+
+        if ("sch_last" in data) {
+            $("input[name='relayLastSch']", line)
+                .prop('checked', data.sch_last[i])
+                .attr("id", "relayLastSch" + i)
+                .attr("name", "relayLastSch" + i)
+                .next().attr("for","relayLastSch" + (i));
+        }
 
         if ("group" in data) {
             $("input[name='mqttGroup']", line).val(data.group[i]);

code/html/index.html

@@ -1417,7 +1417,7 @@
                         <div class="header">
                             <h1>RULES</h1>
                             <h2>
-                                Here you can configure advanced rules based on RPN expressions. Check the <a href="https://github.com/xoseperez/espurna/wiki/RPN-Rules" target="_blank">wiki page about the RPN Rules module</a> to know how to use them.
+                                Here you can configure advanced rules based on RPN expressions. Check the <a href="https://github.com/xoseperez/espurna/wiki/RPN-Rules" rel="noopener" target="_blank">wiki page about the RPN Rules module</a> to know how to use them.
                             </h2>
                         </div>
 
@@ -1438,7 +1438,7 @@
                                         Mind that calling a non-existing variable from a rule will make it silently fail.
                                     </div>
                                 </div>
-    
+
                                 <div class="pure-g">
                                     <label class="pure-u-1 pure-u-lg-1-4" for="rpnDelay">Execution delay (ms)</label>
                                     <input class="pure-u-1 pure-u-lg-1-4" name="rpnDelay" type="number" min="100" tabindex="101" />