Ceph Dashboard UI Enhancement and Improved Community Branding

Ceph Dashboard is the built-in web-based management application for the Ceph distributed storage project. It consists of a Python-based backend that runs as a Ceph Manager module and an Angular-based web frontend that communicates via the backend with a REST API. There are a number of user interface improvements that are high on the “nice to have” side, but always fall behind due to other priorities, especially new features. The goal of this project is to implement some of these ideas and also documents these in a style guide that other developers can refer to.