fix actions css
Merge branch 'hotfix/css'
Merge tag 'css' into develop

fix actions css css
update a.html archives.html stars.html actions display(use dropdown style).
fix: can't delete an item if an item has been edited.
start to write new func: drop all items.
plan: write unit test.
mostly finish the drop-all func but with some trouble.
fix: drop all items.
use flash category to show different style flash messages.
fix typo.