Interactive Filters: add title to year slider

[sosiology]

Description

The year slider is missing the title. I assume this might be due to limited space, but having it displayed might improve consistency.

Solution

Considered alternative

Use cases and impact

Additional context

Client Feedback: #2352 (comment)

[sosiology]

Decision: not implemented to avoid occupying additional space, specially on mobile and in embed mode (we also technically do not have title for other interactive slider in other places). As usually we have only one temporal dimension in a dataset. Also see #2352 (comment)