FIX: Correctly format spaces in Read mode.
FIX: Icons on work page.
FIX: Don't fail when deleting glossary entry.

Was happening if no `glossary.edits` was existing in the doc.
FIX: Correctly adapt text box size while editing.
FEATURE: Splits and joins are synchronized live (#48).
FIX: Show in the chat who enters/quits a work page.
FIX: Avoid to show messages twice at work page load.
FIX: Don't pop chat window on message received.

Use visual hints instead for other users' actions, user can look at it if he wants.
FIX: Show session window less often.

Only when another user logs in or out, and for shorter time.
FIX: Network fault tolerance on work page.