Add actions for default pages for easy configuration of keyboard shortcuts

Bernhard Friedreichrequested to merge
friedreich/plasma-systemmonitor:work/actions-for-default-pages into master

Add all default pages as actions to allow easy configuration of keyboard shortcuts. Also added the overview page as action as the default page can be changed to some other page.

image

This MR is the result of this comment: !426 (comment 1470203)

Merge request reports