Fix sync issues when going from details to list

When going from migration details page to migrations list page, the
migrations list page would briefly display an older status of the
migration from the details page.

src/stores/MigrationStore.js

@@ -84,7 +84,10 @@ class MigrationStore {
 
     try {
       let migration = await MigrationSource.getMigration(migrationId, options && options.skipLog)
-      runInAction(() => { this.migrationDetails = migration })
+      runInAction(() => {
+        this.migrationDetails = migration
+        this.migrations = this.migrations.map(m => m.id === migration.id ? migration : m)
+      })
     } finally {
       runInAction(() => { this.detailsLoading = false })
     }

src/stores/ReplicaStore.js

@@ -105,7 +105,10 @@ class ReplicaStore {
 
     try {
       let replica = await ReplicaSource.getReplica(replicaId, options && options.skipLog)
-      runInAction(() => { this.replicaDetails = replica })
+      runInAction(() => {
+        this.replicaDetails = replica
+        this.replicas = this.replicas.map(r => r.id === replica.id ? replica : r)
+      })
     } finally {
       runInAction(() => { this.detailsLoading = false })
     }