fix(block) Block hash: Fix block number pipe

src/app/block/block.page.html

src/app/certification/history/cert-history.page.html

src/app/currency/currency.page.html

src/app/currency/currency.page.ts

src/app/network/network.service.ts

src/app/settings/settings.service.ts

src/app/shared/functions.ts

src/app/shared/pipes/amount.pipe.ts

src/app/shared/pipes/block-number.pipe.ts

src/app/shared/pipes/block-timestamp.pipe.ts