Solidity Compiler in UI (#3279)

* Added new Deploy Contract page // Use Brace in React #2276

* Adding Web Wrokers WIP

* Compiling Solidity code // Getting mandatory params #2276

* Working editor and deployment #2276

* WIP : displaying source code

* Added Solidity hightling, editor component in UI

* Re-adding the standard Deploy Modal #2276

* Using MobX in Contract Edition // Save to Localstorage #2276

* User select Solidity version #2276

* Loading Solidity versions and closing worker properly #2276

* Adds export to solidity editor #2276

* Adding Import to Contract Editor #2276

* Persistent Worker => Don't load twice Solidity Code #2276

* UI Fixes

* Editor tweaks

* Added Details with ABI in Contract view

* Adds Save capabilities to contract editor // WIP on Load #3279

* Working Load and Save contracts... #3231

* Adding loader of Snippets // Export with name #3279

* Added snippets / Importing from files and from URL

* Fix wrong ID in saved Contract

* Fix lint

* Fixed Formal errors as warning #3279

* Fixing lint issues

* Use NPM Module for valid URL (fixes linting issue too)

* Don't clobber tests.