webhooks and small fixes

...app/appmarket/admin/configuration/configuration.routes.ts

...min/webhook/webhook-details/webhook-details.component.css

...in/webhook/webhook-details/webhook-details.component.html

...webhook/webhook-details/webhook-details.component.spec.ts

...dmin/webhook/webhook-details/webhook-details.component.ts

...ket/admin/webhook/webhook-list/webhook-list.component.css

...et/admin/webhook/webhook-list/webhook-list.component.html

...admin/webhook/webhook-list/webhook-list.component.spec.ts

...rket/admin/webhook/webhook-list/webhook-list.component.ts

src/app/appmarket/appmarket.module.ts

src/app/model/webhook.ts

src/app/service/webhook.service.ts

src/app/shared/admin/clusters/manager/manager.component.html

src/app/shared/admin/clusters/manager/manager.component.ts

src/app/shared/left-menu/left-menu.component.html