Add some linting rules for the CI (#587)

* enable one-var rule

* enable indent rule

* enable no-multiple-empty-lines rule

* enable no-empty rule

* enable no-trailing-spaces rule

* enable no-extra-semi rule

* add eslint rules to fix block spacing

* enable max-statements-per-line rule

* enable brace-style rule

* fix some spacing issues and add future rules

* add code suggestions

src/scripts/librarymenu.js

@@ -189,7 +189,6 @@ define(["dom", "layoutManager", "inputManager", "connectionManager", "events", "
             html += "</div>";
         }
 
-
         // add buttons to navigation drawer
         navDrawerScrollContainer.innerHTML = html;
         // bind logout button click to method