Weather sensor data graph display

Summary: Weather sensor data is collected over time and displayed as graph. The user can switch between all available sensors from INDI Weather.

Test Plan: Add a weather device to your EKOS profile - use Weather Simulator if no own Weather device is present - and check, whether the available sensor data is displayed correctly over time.

Reviewers: mutlaqja, TallFurryMan

Reviewed By: mutlaqja

Subscribers: kde-edu

Tags: KDE Edu

Differential Revision: https://phabricator.kde.org/D24528