[Cashtab] Better css for configure options
Summary: We cannot be sure of text length since some users translate Cashtab. So, support word-wrap for settings options. Improve styling so switch is always a constant size.
Test Plan:
npm test, review screenshot
before:
after:
Reviewers: #bitcoin_abc, PiRK
Reviewed By: #bitcoin_abc, PiRK
Differential Revision: https://reviews.bitcoinabc.org/D15691