manual database backups scheduled once per server

interface/lib/classes/plugin_backuplist.inc.php

@@ -58,7 +58,7 @@ class plugin_backuplist extends plugin_base {
 		if ($tmp['number'] == 0) {
 			if($action_type === 'backup_database') {
 				// get all server ids of databases for this domain
-				$sql = 'SELECT `server_id` FROM `web_database` WHERE `parent_domain_id` = ?';
+				$sql = 'SELECT distinct(`server_id`) FROM `web_database` WHERE `parent_domain_id` = ?';
 				$result = $app->db->query($sql, $domain_id);
 				while(($cur = $result->get())) {
 					$server_id = $cur['server_id'];

interface/web/sites/templates/web_backup_list.htm

 <h3><tmpl_var name="manual_backup_title_txt"></h3>
-<button class="btn btn-default formbutton-default" type="button" onclick="ISPConfig.confirm_action('sites/web_vhost_domain_edit.php?id={tmpl_var name='parent_id'}&next_tab=backup&make_backup=database&','{tmpl_var name='make_backup_confirm_txt'}');">{tmpl_var name="make_backup_database_txt"}</button>
-<button class="btn btn-default formbutton-default" type="button" onclick="ISPConfig.confirm_action('sites/web_vhost_domain_edit.php?id={tmpl_var name='parent_id'}&next_tab=backup&make_backup=web&','{tmpl_var name='make_backup_confirm_txt'}');">{tmpl_var name="make_backup_web_txt"}</button>
+<button class="btn btn-default formbutton-default" type="button" onclick="ISPConfig.confirm_action('sites/web_vhost_domain_edit.php?id={tmpl_var name='parent_id'}&next_tab=backup&make_backup=database','{tmpl_var name='make_backup_confirm_txt'}');">{tmpl_var name="make_backup_database_txt"}</button>
+<button class="btn btn-default formbutton-default" type="button" onclick="ISPConfig.confirm_action('sites/web_vhost_domain_edit.php?id={tmpl_var name='parent_id'}&next_tab=backup&make_backup=web','{tmpl_var name='make_backup_confirm_txt'}');">{tmpl_var name="make_backup_web_txt"}</button>
 
 <tmpl_if name="msg">
   <br><br>