Improves create point of sale view (#2646)

* re-ordering

* adds section header

* updates label on "products"

* changes button to primary

* moves description

* updates partial

* re-ordering + section headers

* more section heads and ordering

* redorders

* Toggle custom amount and tips settings

* Use display name for point of sale app type

* Use switches for enabling options

* Add space before required indicator

* Set and consolidate view model display names

* Move redirects and custom CSS to additional options

* Revert to checkbox for discounts

* adds padding

* removes bs-parent for multiple open elements on accordion

* adds helper text to discount checkbox

* updates "default view" label text

* wording cleanup

* more wording adjustments

* updates

* Add display names for app types

* Extract template editor inline styles

* updates helper text

* Display names for app types

* Typo fix

* Move template back to editor

* Fix selenium test

Co-authored-by: Dennis Reimann <mail@dennisreimann.de>

BTCPayServer/Models/AppViewModels/CreateAppViewModel.cs

@@ -1,5 +1,6 @@
 using System.ComponentModel.DataAnnotations;
 using System.Linq;
+using System.Reflection;
 using BTCPayServer.Data;
 using BTCPayServer.Services.Apps;
 using Microsoft.AspNetCore.Mvc.Rendering;
@@ -44,7 +45,11 @@ namespace BTCPayServer.Models.AppViewModels
         void SetApps()
         {
             var defaultAppType = AppType.PointOfSale.ToString();
-            var choices = typeof(AppType).GetEnumNames().Select(o => new Format() { Name = o, Value = o }).ToArray();
+            var choices = typeof(AppType).GetEnumNames().Select(o => new Format
+            {
+                Name = typeof(AppType).DisplayName(o), 
+                Value = o
+            }).ToArray();
             var chosen = choices.FirstOrDefault(f => f.Value == defaultAppType) ?? choices.FirstOrDefault();
             AppTypes = new SelectList(choices, nameof(chosen.Value), nameof(chosen.Name), chosen);
             SelectedAppType = chosen.Value;