Fixed issues relating to custom-inputs

* Don't duplicate custom input when editing before db persist
* Remove correct custom input during delete pre db persist (id undefined)
* Moved typings to prisma, keeping backwards compatibility with @map
* Updated all usages of the enum

lib/eventTypeInput.ts

@@ -1,13 +0,0 @@
-export enum EventTypeCustomInputType {
-    Text = 'text',
-    TextLong = 'textLong',
-    Number = 'number',
-    Bool = 'bool',
-}
-
-export interface EventTypeCustomInput {
-    id?: number;
-    type: EventTypeCustomInputType;
-    label: string;
-    required: boolean;
-}