feat: #9559, set order help text

public/language/en-GB/admin/manage/categories.json

@@ -33,6 +33,7 @@
 	"analytics": "Analytics",
 	"view-category": "View category",
 	"set-order": "Set order",
+	"set-order-help": "Setting the order of the category will move this category to that order and update the order of other categories as necessary. Minimum order is 1 which puts the category at the top.",
 
 	"select-category": "Select Category",
 	"set-parent-category": "Set Parent Category",

public/src/admin/manage/categories.js

@@ -49,7 +49,7 @@ define('admin/manage/categories', [
 			var order = $(this).attr('data-order');
 			var modal = bootbox.dialog({
 				title: '[[admin/manage/categories:set-order]]',
-				message: '<input class="form-control input-lg" value=' + order + ' />',
+				message: '<input type="number" min="1" class="form-control input-lg" value=' + order + ' /><p class="help-block">[[admin/manage/categories:set-order-help]]</p>',
 				show: true,
 				buttons: {
 					save: {