Add option to set number of rows in dashboard subscriptions

In some situations, it is desirable to limit the number of rows
returned by a dashboard subscriptions.  This patch adds a new
option to the dashboard subscriptions to allow the administrator
to change the available options for the number of rows returned.

etc/RT_Config.pm.in

@@ -971,6 +971,16 @@ With this enabled, some parts of the email won't look exactly like RT.
 
 Set($EmailDashboardInlineCSS, 0);
 
+=item C<@DashboardSubscriptionRows>
+
+Define the options available in the Rows dropdown on the dashboard
+subscription page. Add "0" to the list to allow users to select
+"Unlimited" rows.
+
+=cut
+
+Set(@DashboardSubscriptionRows, (1, 2, 5, 10, 15, 20, 25, 50, 75, 100, 0));
+
 =back
 
 

lib/RT/Config.pm

@@ -1994,6 +1994,9 @@ our %META;
     EmailDashboardInlineCSS => {
         Widget => '/Widgets/Form/Boolean',
     },
+    DashboardSubscriptionRows => {
+        Type    => 'ARRAY',
+    },
     DefaultErrorMailPrecedence => {
         Widget => '/Widgets/Form/String',
     },

share/html/Dashboards/Subscription.html

@@ -198,7 +198,7 @@
       <div class="row">
         <div class="col-auto">
           <select name="Rows" class="form-control selectpicker">
-% for my $rows (1, 2, 5, 10, 15, 20, 25, 50, 75, 100, 0) {
+% for my $rows ( RT->Config->Get('DashboardSubscriptionRows') ) {
             <option value="<% $rows %>" <% $fields{'Rows'} eq $rows ? 'selected="selected"' : '' |n %>><% loc($rows || 'Unlimited') %></option>
 % }
           </select>