Bug 445637

SUMMARY
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To make the new overview effect truly a great 1 stop shop for getting things done quickly between tasks, I believe allowing the new krunner functionality to interact with workspaces + panels, and by extension allow users to interact with the panel in overview in general.

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Desired actions from overview
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- Drag items from krunner to panel
- Drag krunner application items to a workspace to launch on a specific workspace
- Access panel quickly to change systray and appindicators

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Use cases:
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1. User wishes to see panel while full screen.
   - A user can access overview and directly adjust systray or appindicator options.
   - Specific: A user is playing a full screen game with a controller and the screen sleep keeps going off. Hit overview and click the widget/appindicator for caffeine-ng


2. User wishes to pin an application from krunner onto his panel
   - A user can hit overview button, type an app name, then drag it to the panel for quick launching
   - A user wishes to launch an app on a new workspace
   - A user can access overview and search an app, then drag to a new workspace to launch it on that workspace

Note: I know the panel related items may be really difficult technically with kwin's structure just from hearing the parachute dev's comments, but maybe not. Thought I would throw it out there.
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SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: Manjaro Linux
(available in About System)
KDE Plasma Version: 5.23
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION