Use up/down arrow keys on transactions viewer.

Changes selected entry (but not current entry).
Scroll behaviour similar to navigating left/right to change current entry - selected entry scrolls to top.

Screencast: https://screencast.googleplex.com/cast/NDg1Nzc4ODU1NDU0MzEwNHwwNTk0ZjFjNy1jYg

Fixes: 266700247
Test: npm run test:unit:ci
Change-Id: Idede107322ded3bff606845c2786b38e388bdfe2
6 files changed