fix(blacklist): request data only when modal is shown, remove useless ratelimit and lazy load blacklist (#1084)

* perf: remove eager load of Blacklist entity from Media entity

Try to resolve some performance issues by removing the eager loading of Blacklist items from the
Media entity

* fix: fix ManageSlideOver for blacklist

* perf(blacklist): request data only when modal is shown

For admin users, the button to blacklist a media (used on every media card) was displaying a Modal,
that was requesting data BEFORE the modal was displayed. This resulted in dozens of additional
requests everytime media cards were displayed.

* perf(blacklist): remove useless ratelimit

server/entity/Media.ts

@@ -118,10 +118,8 @@ class Media {
   @OneToMany(() => Issue, (issue) => issue.media, { cascade: true })
   public issues: Issue[];
 
-  @OneToOne(() => Blacklist, (blacklist) => blacklist.media, {
-    eager: true,
-  })
-  public blacklist: Blacklist;
+  @OneToOne(() => Blacklist, (blacklist) => blacklist.media)
+  public blacklist: Promise<Blacklist>;
 
   @CreateDateColumn()
   public createdAt: Date;