modify log settings
loggin error message
1. logging error msg
2. check upload file type
1. bugfix load config.yaml
1. bugfix load long.jpg
add long.jpg
remove unused css class
1.bugif group avatar
2.add submit loading.gif
add submit loading.gif
add submit loading.gif
add submit loading.gif
add submit loading.gif
add .topic-text csss
add submit-loading
add submit-loading
add submit-loading