Calendar component

[glebfox]

Free part of https://fullcalendar.io/demos looks promising, but further research is needed.

[Flaurite]

Other options:

• https://ui.toast.com/tui-calendar
• https://github.com/vkurko/calendar

[glebfox]

• When using io.jmix.flowui.model.CollectionContainer#replaceItem: old version of related calendar event is also displayed.

• Fix event hover background color and cursor - uses hardcoded color instead of theme dependant

• Fix focus color - uses browser default color

Do not extend Vaadin's AbstractValueProvider

[rusiaikinat]

there is no description of actions for the calendar in the descriptor

[rusiaikinat]

<valuePicker id="recurringDaysOfWeekField" property="recurringDaysOfWeek">
                <actions>
                    <action id="daysOfWeekEdit" type="fcalen_daysOfWeekEdit"/>
                    <action id="clear" type="value_clear"/>
                </actions>
</valuePicker>