feat: dark mode send funds modal and notifications

[corquaid]

Description

Dark mode update for:

• [x] Tari mining notification
• [x] Send funds modal
• [x] Send funds notifications (processing, pending, completing)

Motivation and Context

36 (partial)

How Has This Been Tested?

Screenshots

Tari Mining Notification

Send Funds Modal

Send Funds Processing

Send Funds Pending

Send Funds Completing

[corquaid]

This is from Figma, it's more obvious in dark mode: