* NewPanelEditor: Panel edit tweaks (#22415)

* NewPanelEditor: Alternative edit layout

* Fixed full height issue

* panel-edit-tabs experiment

* minor tweaks

* PanelEditor: Minor tweaks

* Docs: URL update to Relref to repair broken links

Rewrote URL references in the text for the Administration guide
and older Whats New page to repair broken links, and change
to the Relref format to build the website with Hugo.

Closes #22378

* Remove stale file, caught in this
branch and PR from my Fork. contribute/style-guides/markdown-style-guide.md

Co-authored-by: Torkel Ödegaard <torkel@grafana.com>
Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com>