[Dashboard Usability] Centralize Panel Editing - Title, Description & Time Range

[ThomThomson]

Introduction

As a precursor to the inline edit initiative, we should think about rearranging all of the existing panel settings panes and windows into one unified experience for dealing with dashboard panel-level state.

Pieces of state to include

• Description - this is likely the most important single piece of state to expose, as the editing experience today only allows descriptions to be set on by reference visualizations. Description should be exposed and modifiable through this new unified panel options pane. Related issue Allow adding notes from the dashboard while changing panel title #83743. An additional complexity here will be that the description for by reference visualizations is set by the saved object. A system similar to the title system will need to be introduced where there are two levels of description, dashboard-level and saved object level.
• Title - this will just need to be moved from the existing title editing modal
• Time range - this will just need to be moved from the existing title editing modal

[elasticmachine]

Pinging @elastic/kibana-presentation (Team:Presentation)