Keep GUI parameters for scheduler and capture in sync with row selection

Summary:
When selecting a certain line in the scheduler tab or in the capture tab, the GUI is synched with the selected row and displays the values of the selected job.

Additionally, a typo in the scheduler state has been corrected.

Test Plan:

• Create a capture plan with multiple entries and select them with a mouse click or using the arrow keys. Check, that the correct values are displayed.
• Do the same for the scheduler.

Reviewers: mutlaqja, TallFurryMan

Reviewed By: mutlaqja, TallFurryMan

Subscribers: kde-edu

Tags: KDE Edu

Differential Revision: https://phabricator.kde.org/D19648