[Merge] lp:~artmello/webbrowser-app/webbrowser-app-bookmark_folders into lp:webbrowser-app

[Arthur Mello]

Following some Bill's suggestions, I am showing the bookmark folders when the user click in the "see more" bookmarks button. Now, when the user click in the "see more" we show all the bookmarks separated by folder. All the folders are expanded and we can collapse them if we click in the folder name. Since that was not specified by the design team any feedback about the UX will be really appreciated
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https://code.launchpad.net/~artmello/webbrowser-app/webbrowser-app-bookmark_folders/+merge/260410
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