Live renderables

[FedeClaudi]

Working on live renderables.

• improve app layout/size control
• fix help message
• make sure all widgets work

Docs:

• widget API
• app
• changes to progress
• changes to inspect
• widgets
  • menu widget and multi-select
  • user input widget
  • buttons
  • pager
  • gallery
• tutorial
  • basic app
  • filling it in
  • advanced example

Test

• add again missing tests
• figure out how to test live renderables well

dones

• make rendering faster by only applying to lines that changed
• tab viewer: enforce constraints on content size. improve performance on pager tab
• improve inspect menu bar and rendering
• improve progress bar (print stdout)
• help: print docstrings of calls to key pressed functions
• app
• add transition rule for app based on charkey
• refactor code
• refactor key controls
• add validation of widgets with helpful messages

Widgets:

• menu widget and multi-select
• user input widget
• buttons
• pager
• gallery

Small fixes:

• progress bar on pager
• add a callback to buttons

Examples:

• pager/menu
• "tabs" complex stuff
• color picker

[codecov-commenter]

Codecov Report

Merging #152 (986f118) into master (82f1dbe) will decrease coverage by 23.90%.
The diff coverage is 16.29%.

@@             Coverage Diff             @@
##           master     #152       +/-   ##
===========================================
- Coverage   94.94%   71.04%   -23.91%     
===========================================
  Files          38       46        +8     
  Lines        2473     2797      +324     
===========================================
- Hits         2348     1987      -361     
- Misses        125      810      +685     

Impacted Files	Coverage Δ
src/Live/_input.jl	0.00% <0.00%> (ø)
src/Live/abstract_container.jl	0.00% <0.00%> (ø)
src/Live/abstract_widget.jl	0.00% <0.00%> (ø)
src/Live/app.jl	0.00% <0.00%> (ø)
src/Live/buttons.jl	0.00% <0.00%> (ø)
src/Live/gallery.jl	0.00% <0.00%> (ø)
src/Live/menus.jl	0.00% <0.00%> (ø)
src/Live/pager.jl	0.00% <0.00%> (ø)
src/Live/widgets.jl	0.00% <0.00%> (ø)
src/Term.jl	90.00% <ø> (ø)
... and 26 more

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[FedeClaudi]

To Document

• basic LIVE api
• changes to Progress bar API

[FedeClaudi]

closing to merge onto 2.0 branch