Typo unwatching lists. (#55)

This is actually really bad.
For multiple reasons.
The best way for this to be avoided is to drop everything
and reload it when the account data for watched lists is changed.
Then there isn't a situation where you have to inform anyone
about a change in what lists are being watched.

src/models/AccessControlUnit.ts

@@ -241,7 +241,7 @@ export default class AccessControlUnit {
 
     public unwatchList(list: PolicyList) {
         for (const cache of this.caches) {
-            cache.watchList(list);
+            cache.unwatchList(list);
         }
     }