[#706] Add Pylint W0403 Compliance
1. Forced scrollbar to prevent horizontal "jumping" of divs when moving between different pages.
2. Added automatic scroll-to-top when selecting a merchant node.
3. Fixed HTML typo on Message Compose button.
Remove 'g++' from ubuntu package Depends

Remove 'g++' from ubuntu package Depends.
The package 'build-essential' is depends on the package 'g++'.
Merge pull request #1054 from abderraouf-adjal/patch-1

Remove 'g++' from ubuntu package Depends
Merge pull request #1042 from Klakurka/JS-CSS-revisions-A

Misc UI improvements, auto-scroll-to-top on-click (merchant nodes)
Merge pull request #1028 from prikhi/706-pylint-w0403

[#706] Add Pylint W0403 Compliance
Merge pull request #1 from OpenBazaar/develop

Update