[FEATURE] RT-2463 Balances sidebar widget LESS

Add LESS file for displaying account balances in a sidebar widget.
[FEATURE] RT-2463 LESS: Generalize currency colors

Colorization by currency is no longer used by Balance tab only, but also
by Balances sidebar widget.
[FEATURE] RT-2463 Sidebar: Add Balances widget

Add Jade template for sidebar balances widget.
[FEATURE] RT-2463 Balances wid.: Template includes

Include sidebar with balances widget in Send, Trade, Convert tabs.
Allow user to set max network fee in advanced settings
[FIX] RT-2463 Remove sidebar widgets horizontal padding
Merge pull request #1694 from jublonet/feature/2463-balances-in-sidebar

Add balances widget in sidebar
[FIX] RT-1227: Client should parse "address?dt=xxx"
[FIX] RT-2534 fix destination tag delete from contact
Refactor button(id="idname") to button#idname in *.jade files
[FIX]  RT-2134 Remove confirmation msg when user deletes trust line with no balance
[FIX] RT-2399 Wrong currency asked for conversion when removing a trusted gateway
Merge pull request #1719 from darkdarkdragon/develop-RT-1227

[FIX] RT-1227: Client should parse "address?dt=xxx"
[TEST] RT-2453 E2E tests for login page

RT-2453 #inreview
Requires running `webdriver-manager start` and configuring old user in test
config file `protractor.conf.js`.
Merge pull request #1722 from darkdarkdragon/develop-RT-2399

[FIX] RT-2399 Wrong currency asked for conversion when removing a truste...
Merge pull request #1724 from jublonet/feature/2453-e2e-login

[TEST] RT-2453 E2E tests for login page
[TASK] Currencies: Extend currencies file with short_val and standard_precision
[TASK] Currencies: Change val to value
[TASK] Currencies: Add all ISO currencies to currencies data file
[FIX] Currencies: Fix comma issues