Fix indexeddb logging
Fix indexeddb logging

1. Fix double 'loaded' on sync data logging
2. Move the 'loaded' message into the bit where the data has
   actually loaded rather than the promise try block.
3. Add '...' to the 'loading' messages so they're easier to tell
   apart from the 'loaded' messages.

matrix-org/matrix-js-sdk,krombel/matrix-js-sdk,matrix-org/matrix-js-sdk,krombel/matrix-js-sdk,krombel/matrix-js-sdk,matrix-org/matrix-js-sdk,matrix-org/matrix-js-sdk