Add "today" button to report date picker

[fniessink]

User story

As a user I want to have a today button in the date picker so that I don't have to look up the date somewhere else to select today.

Acceptance criteria

• Clicking the today button in a date picker selects the current date.

Assumptions

• Either the current date picker allows for this functionality or a composite component can be made.

Open issues

• Should selecting today also close the date picker and save the change?

Out of scope

• Upgrading the date picker, see Upgrade to React 18 #4167.
• Other suggestions made below in the comments.

Tasks

Components

Frontend

• Add today button to date picker.

Documentation

• Update changelog

Related issues

• Blocked by: Replace date picker with a date picker widget that supports React 18 #4467.
• Upgrade to React 18 #4167

[Sebastiaan127001]

%VOTE

[Sebastiaan127001]

And also mark the current date in the calendar
and have it start on Monday as the first day of the week.

[Sebastiaan127001]

and another related feature request:

• add days left after the set date. so in the below image that would be 2022-04-20 (6 days from now)
  

• change title 'technical debt end date' to 'technical debt end'

• mark the end date of sprint when QT knows this

[Sebastiaan127001]

And if the user clicks on a greyed out date from the next or previous month, the picker should switch to that month.