global "Run now" scheduler button on new Settings page (v1.3)

Template/config/show.php

@@ -0,0 +1,14 @@
+<div class="page-header">
+    <h2><?= t('RecoReco') ?></h2>
+</div>
+
+<p class="form-help">
+    <?= t('Run the recurring-card scheduler now. This spawns every template card whose occurrence is due, on all boards -- the same pass the cron job runs. It is safe to run at any time: an occurrence is never spawned twice.') ?>
+</p>
+
+<form method="post" action="<?= $this->url->href('ConfigController', 'run', array('plugin' => 'RecoReco')) ?>">
+    <?= $this->form->csrf() ?>
+    <div class="form-actions">
+        <button type="submit" class="btn btn-blue"><?= t('Run now') ?></button>
+    </div>
+</form>