Documentation TODO list

[djowel]

• Setup
• Aspects
• Quick Tutorials
  • Examples
• Foundation
  • Elements
    • Display
    • Control
  • Proxies
  • Composites
  • Custom Element Design
  • Designing for Composition
  • Value semantics ( see Checkbox checkmark is not updated when linking controls. #179 )
• Primitives
• Layout
• Gallery
• App
• Window
• View
  • Base View
• Thread Model
• Support
  • Canvas (unify with Artist docs)
  • Context
  • Font (Already in Artist)
  • Pixmap
  • Theme
  • Sender / Receiver
• Hosts
• API Reference
• Misc
  • Fix https://cmake.org/install/ link in setup docs
  • Update aspect docs (added margin on thumb)
  • Naming guidelines doc
  • Roadmap doc
  • Documentation: generate a sidebar TOC from page headings
  • List of widgets and planned features?
  • Fix GitHub Pages to allow go:image

Each of these may move to an actual issue when needed