Add config/config.yaml to set default configurations. Use the config/local_config.yaml to set the custom configurations
Change-Id: I22049e478b6440c765751c8f17663f36f33c277a
1. Fix the options of less-loader to match customized themes
2. Fix some color to variable style in tab detail to get better extension
Change-Id: I9cfaf09a72ede2e3db36176c256bbe307f4e5d0b