Internal transactions list page (blockscout#2553)

* Internal transactions list page

Fixes blockscout#2526

* update nav icon for internal txns route

* fix ts error

* fix external txs test

update paths for 3rd party resources

[skip ci] ooops

fixes

refetch user balance after unified login

fix ts

Explorers section: bring hashes to lower case in the url (blockscout#…

…2481)

Explorers section: bring hashes to lower case in the url (blockscout#…

…2481)

fix tests

fix tests