refs aura#242
refs #282
refs #283

refs #290

refs #290

refs #290

We sometimes want to hide a container if all child APermissionGuard
instances are hidden. This is now possible with the
areAllChildGuardsHidden slot property.

refs #290

refs #244

refs #244

licenseId and isUseExplicitlyGrantedByAuthor were missing in the saved
data and are a little tricky because FormData objects only support
string values. Thankfully, DRF supports sensible string values even for
non-string fields.

refs #244

Steering has removed the thumbnails property from image fields and we
can now request arbitrary images sizes from the image render API.

There’s no need to worry about IPv6 in this scenario and it keeps things
simple.

Change `aura` UID:GID to value in the sysuser range

See merge request !42

refs #284

The navigation logic was extensible but also a bit overengineered for
our purposes and kind-of invented a DSL for generating nav entries. We
should be better off with a more direct approach.

Type checks seem to have silently passed even though there were errors
since the upgrade to vue-tsc v2, because the typescript dependency was
too old.

This highlights events with negative durations. There might be other
invalid event states that we could/should visualize so that they are
adressed.

These event states shoud probably be fixed in steering, but it might be
good to spot them if they pop up.

Brightness filter doesn’t look good everywhere.

Timeslots might be cut as a result of conflict solutions. The start and
end time should therefore be part of the cache key.

Up until now the calendar kept a single record of calendar events. This
record was modified whenever new or other events needed to be displayed.
Events were added/changed/removed imperatively (i.e. when
entering/leaving conflict mode), which goes against the principle of
unidirectional data flow embraced by Vue and other reactive frameworks.

The calendar is now split into separate components most importantly the
normal week view and a separate conflict view with separate state
management. The state management itself has been reworked and improved
so that it uses unidirectional data flow.

These changes massively improve performance, simplify state management,
and should make it easier to reason about the code (conflict mode was
hard!).

fixes #287