Use error logs to prevent further errors

[jackellenberger]

on sync and upload we see a lot of error_name_taken_i18n. We don't expect to stop seeing those error messages, so we should collect those reserve-word-emoji and store a list of em and stop trying to reupload them.

• add i18n_emoji.json
• add logic to add to i18n_emoji.json automatically
• remove emoji from upload queue that collide with i18n_emoji.json