* ['notice' popover, 'all notice' dialog] fixup for mobile
* ['Files' page] fixed library icon size for mobile
* ['settings' page] fixup for 'Email notification'
* ['my libs'] fixed 'star/unstar', 'share', 'delete'
* ['deleted repos' dialog] modified column width of the table for mobile
* ['share' dialog] modified 'link details' panel for mobile
* [side panel resizer] removed it for mobile
* [group/department, shared with all] fixed the operation menu for mobile
* ['dir view'] don't offer 'repo history' page for mobile
* ['help'] fixup for page with large images, for mobile
- fixup for http://127.0.0.1:8000/help/drive_client_2.0_for_windows_10/
(in mobile, the content of it overflowed to the right, and was cut off)
* ['file view'] removed 'history' page for mobile
* ['markdown file view'] removed 'history' page for small screen, mobile
* ['dir view'] added a gray layer to close the 'file/folder tree' panel in mobile
* ['dir view'] fixup for the 'path' bar in mobile
* ['dir view', 'shared dir view'] don't display the 'tag list' in root for mobile
* [my deleted libraries] redesigned it
* moved the entrance from the right corner to the left dropdown menu of
'My Libraries' page
* redesigned it: changed it from an independent page to a dialog
* [my deleted libraries] improved UI details for the dialog(repo list & empty tip)
