Adds JSDocs comments to some methods in global.js. Refactors styles in main.css to improve visual appealing and to give better use to the reduced real state.
Refactors some patterns to move the actions in the action bar buttons to the <i> elements, who receive the clicks. Updates main.popover.html to reflect this changes. Starts implementing the logic to handle actions on repos. 'Open repo' action is now fully functional.