Fix Enable checkbox behavior on Scrip Creation

In fee8a9b, the previous EditScrip page was split into Create and
Modify. In the process of doing so, some elements were not properly
adapted to the Create scrip page. This led to the fact that the
"Enable" checkbox had no effect on Scrip Creation page and Scrips were
being created as enabled regardless of the checkbox state.

share/html/Admin/Scrips/Create.html

@@ -61,11 +61,11 @@
       <& /Admin/Elements/SelectStage, Default => $ARGS{"Stage"} &>
   </&>
 
-<input type="hidden" class="hidden" name="SetEnabled" value="1" />
-
 <&| /Elements/LabeledValue, Label => '' &>
   <div class="custom-control custom-checkbox">
-    <input type="checkbox" class="custom-control-input checkbox" name="Enabled" id="Enabled" value="1" <% $ARGS{'Enabled'}? 'checked="checked"': '' |n%> />
+% # If $Create is not defined, it means that it's the first time the user
+% # sees the form and we should check the box by default.
+    <input type="checkbox" class="custom-control-input checkbox" name="Enabled" id="Enabled" value="1" <% ($ARGS{'Enabled'} || !$Create ) ? 'checked="checked"' : '' |n %> />
     <label class="custom-control-label" for="Enabled"><&|/l&>Enabled (Unchecking this box disables this scrip)</&></label>
   </div>
  </&>
@@ -96,8 +96,6 @@
 <%INIT>
 my @results;
 
-$ARGS{'Enabled'} = 1 unless $ARGS{'SetEnabled'};
-
 my $queue_obj;
 if ( $Queue ) {
     $queue_obj = RT::Queue->new( $session{'CurrentUser'} );
@@ -120,7 +118,7 @@
 
         Queue                  => $Queue || 0,
         Stage                  => $ARGS{"Stage"},
-        Disabled               => $ARGS{"Disabled"},
+        Disabled               => $ARGS{"Enabled"} ? 0 : 1,
 
         ScripAction            => $ARGS{"ScripAction"},
         ScripCondition         => $ARGS{"ScripCondition"},