Add functionality to list roles and fetch the usercount inside that role

closes: #1

Client/Modules/SZUAbsolventenverein.Module.AdminModules/Send.razor

@@ -29,6 +29,15 @@
                 </InputSelect>
             </div>
         </div>
+        @if(userCount != null)
+        {
+            <div class="row mb-1 align-items-center">
+                <Label Class="col-sm-3" For="userCount" HelpText="Anzahl an Benutzern in der gew<65>hlten Rolle" ResourceKey="Users">Users in Role: </Label>
+                <div class="col-sm-9" id="userCount">
+                    @userCount
+                </div>
+            </div>
+        }
     </div>
     <p></p>
     <button type="button" class="btn btn-success" @onclick="Save">@Localizer["Save"]</button>
@@ -49,12 +58,7 @@
         new Stylesheet("_content/SZUAbsolventenverein.Module.AdminModules/Module.css")
     };
 
-    private List<Role> roles = new List<Role>
-    {
-        new Role { RoleId = 1, Name = "Admin" },
-        new Role { RoleId = 2, Name = "User" },
-        new Role { RoleId = 3, Name = "Imported" },
-    };
+    private List<Role> roles = new List<Role>();
 
     private int _selectedRoleId = -1;
     private int selectedRoleId
@@ -88,7 +92,9 @@
         ef.ModuleId = ModuleState.ModuleId;
         ef.Content = _richText;
 
-        userCount = await AdminModulesService.GetUsercountInRole(ef);
+        ef = await AdminModulesService.PostUsercountInRole(ef);
+        userCount = ef.UserCount;
+        StateHasChanged();
     }
 
     protected override async Task OnInitializedAsync()
@@ -108,6 +114,7 @@
                     _modifiedby = AdminModules.ModifiedBy;
                     _modifiedon = AdminModules.ModifiedOn;
                 }
+                roles = await AdminModulesService.GetRoles(ModuleState.ModuleId);
             }
         }
         catch (Exception ex)