[Beta] Add scroll when too many accounts

[amaury1093]

Backport #7677 - cherry-pick 6d60286

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (beta@50a58e1). Click here to learn what that means.
The diff coverage is 84.43%.

@@          Coverage Diff           @@
##             beta   #7679   +/-   ##
======================================
  Coverage        ?   81.5%           
======================================
  Files           ?     714           
  Lines           ?   85323           
  Branches        ?     185           
======================================
  Hits            ?   69546           
  Misses          ?   15777           
  Partials        ?       0

Impacted Files	Coverage Δ
machine/src/lib.rs	100% <ø> (ø)
ethcore/evm/src/factory.rs	96.42% <ø> (ø)
hw/src/ledger.rs	12.55% <ø> (ø)
ethcore/src/spec/seal.rs	100% <ø> (ø)
ethcore/src/snapshot/account.rs	96.15% <ø> (ø)
ethcore/light/src/types/request/batch.rs	95.49% <ø> (ø)
ethcrypto/src/lib.rs	86.3% <ø> (ø)
ethcore/src/trace/db.rs	93.41% <ø> (ø)
ethcore/vm/src/schedule.rs	100% <ø> (ø)
ethcore/migrations/src/lib.rs	100% <ø> (ø)
... and 201 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 50a58e1...287038b. Read the comment docs.