* Add next difficulty blocks.
Add next difficulty target date.
Add next difficulty total progress.
Add ajustment difficulty avg min per block.
* Fix typo.
* Trigger difficulty calculation every 5 seconds.
* Add rxjs timer to difficultyEpoch.
* Fix pipe.
* Fix small bar position.
* Change i18n strings.
* Fix typo.
* Add time-until component.
* Speed up difficultyEpoch timer to 1000 ms.
* Fix values to 2 decimal places.
* Add title to fee and difficulty adjustment cards.
* Add title outside the card.
* Fix title to center position.
* Add other titles.
* Add new transalations strings.
Refactor time span component.
* Fix difficulty adjustment i18n string.
Fix duplicated i18n strings.
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