message: Catch errors when checking IndexedDB
  In Firefox private browsing, we may get errors when checking storage
  consistency. We don't want that to block general Riot operation, so catch those
  errors and log instead.
  Fixes
diff: @@ -61,10 +61,16 @@ export async function checkConsistency() {
  }
  if (indexedDB && localStorage) {
  + try {
  const dataInSyncStore = await Matrix.IndexedDBStore.exists(
  indexedDB, SYNC_STORE_NAME,
  );
  log(`Sync store contains data? ${dataInSyncStore}`);
  + } catch (e) {
  + healthy = false;
  + error("Sync store inaccessible", e);
  + track("Sync store inaccessible");
  + }
  } else {
  healthy = false;
  error("Sync store cannot be used on this browser");
  @@ -72,10 +78,16 @@ export async function checkConsistency() {
  }
  if (indexedDB) {
  + try {
  dataInCryptoStore = await Matrix.IndexedDBCryptoStore.exists(
  indexedDB, CRYPTO_STORE_NAME,
  );
  log(`Crypto store contains data? ${dataInCryptoStore}`);
  + } catch (e) {
  + healthy = false;
  + error("Crypto store inaccessible", e);
  + track("Crypto store inaccessible");
  + }
  } else {
  healthy = false;
  error("Crypto store cannot be used on this browser");
  