Starts with an empty set as database

app/src/main/java/com/vitorpamplona/amethyst/model/LocalCache.kt

@@ -762,7 +762,7 @@ object LocalCache {
     }
 }
 
-class LocalCacheLiveData : LiveData<Set<Note>>() {
+class LocalCacheLiveData : LiveData<Set<Note>>(setOf<Note>()) {
 
     // Refreshes observers in batches.
     private val bundler = BundledInsert<Note>(300, Dispatchers.Main)