* [user panel] combined 7 commits into 1:
[user side nav] added 'fold/unfold' for the sidebar
[redesign] redesigned toolbar for 'my libs' & 'shared with all'; redesigned 'top bar' for 'help', 'clients' and other pages
[Shared with all] 'share existing libraries' dialog: added the 'close' icon back, enabled clicking outside to close the dialog
['Invite Guest' page] redesigned the toolbar
['Share Admin' - 'Links'] 'Share Links' page: redesigned the toolbar
['Share Admin' - 'Links'] 'Upload Links' page: redesigned the toolbar
cleaned up code
* [user side panel] update
* [user panel] update
* [code style] update: remove an eslint warning