Tweak provider views (#1499)

* Add Organizations to provider views

Remove enabled/disabled toggle from provider. It's currently not used.

* Remove provider Delete

There are implications to deleting providers on the organizations they manage.
We want to think through this flow before allowing delete from the
admin portal.

* Use toastr to display production exception messages.

Update build actions to upgrade npm to v7.

Use a custom error handler in production which displays a toast of the
exception message and redirect to the offending page

* Clarify provider create error message

src/Admin/Controllers/ErrorController.cs

@@ -0,0 +1,24 @@
+using Microsoft.AspNetCore.Diagnostics;
+using Microsoft.AspNetCore.Mvc;
+
+namespace Bit.Admin.Controllers
+{
+    public class ErrorController : Controller
+    {
+        [Route("/error")]
+        public IActionResult Error(int? statusCode = null)
+        {
+            var exceptionHandlerPathFeature = HttpContext.Features.Get<IExceptionHandlerPathFeature>();
+            TempData["Error"] = HttpContext.Features.Get<IExceptionHandlerFeature>()?.Error.Message;
+
+            if (exceptionHandlerPathFeature != null)
+            {
+                return Redirect(exceptionHandlerPathFeature.Path);
+            }
+            else
+            {
+                return Redirect("/Home");
+            }
+        }
+    }
+}