Readd frame around the main tabs
Keep ETag information for book objects
Make etag comparison type independent
Prevent conflicts on client side
Remember user name
Make LoginDialog a little wider
Allow saving the password
Minor code cleanup
Censor password in error messages
Explicitly handle wrong login credentials
Add return book icon
Handle lesser privileges
Remember tool bar state
Allow toggling the tool bar
Remember table view state
Make column visibilities configurable
Forgot some new columns
Fix display string in unicode
Make tab visibilities configurable
Make lending column more detailed