[Cashtab] Increase Transaction History to 10 transactions

Summary:
Prompted by Alita on Telegram, the current 5 transaction history is a bit limited given we've now released public and private messaging functionalities.

A full refactor to structurally improve the cashtab transaction history retrieval logic will take some time, given the need to evaluate the chronik client, so this diff is an interim adjustment to increase the tx history from 5 to 10 transactions.

Tested across:

• Browsers: Chrome, Firefox, Brave
• Mobile: iOS and Android
• Plugin: Cashtab Extension

No rate limit issues encountered.

Test Plan:

• npm start
• open a wallet with more than 10 transactions, wait for history update, if not send some XEC to trigger the update. Verify exactly 10 transactions are displayed
• open a wallet with less than 10 transactions, ensure the exact number of transactions is displayed.

Reviewers: bytesofman, #bitcoin_abc

Reviewed By: bytesofman, #bitcoin_abc

Differential Revision: https://reviews.bitcoinabc.org/D10747