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/ViewPointOfSaleViewModel.cs

@@ -1,3 +1,4 @@
+using System.ComponentModel.DataAnnotations;
 using BTCPayServer.Services.Apps;
 
 namespace BTCPayServer.Models.AppViewModels
@@ -49,9 +50,11 @@ namespace BTCPayServer.Models.AppViewModels
         public string CustomTipText { get; set; }
         public int[] CustomTipPercentages { get; set; }
 
+        [Display(Name = "Custom CSS URL")]
         public string CustomCSSLink { get; set; }
         public string CustomLogoLink { get; set; }
         public string Description { get; set; }
+        [Display(Name = "Custom CSS Code")]
         public string EmbeddedCSS { get; set; }
     }
-}
+}