MDL-59487 task: Add run again button.

Co-authored-by: Brendan Heywood <[email protected]>

admin/tool/task/lang/en/tool_task.php

@@ -43,6 +43,7 @@ $string['pluginname'] = 'Scheduled task configuration';
 $string['resettasktodefaults'] = 'Reset task schedule to defaults';
 $string['resettasktodefaults_help'] = 'This will discard any local changes and revert the schedule for this task back to its original settings.';
 $string['runnow'] = 'Run now';
+$string['runagain'] = 'Run again';
 $string['runnow_confirm'] = 'Are you sure you want to run this task \'{$a}\' now? The task will run on the web server and may take some time to complete.';
 $string['runpattern'] = 'Run pattern';
 $string['scheduledtasks'] = 'Scheduled tasks';