dash/datagrid2

[vazonik]

Improved version of the DataGrid.

Main changes:

• new code architecture
• columns resizing
• smooth scrolling
• strict or auto row heights
• strongly CSS-customizable
• better columns management
• column distribution (full or fixed)
• destroy & load methods
• title
• no data row

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• To see the specific tasks where the Asana app for GitHub is being used, see below:
  • https://app.asana.com/0/0/1205342953910176

[highsoft-bot]

File size comparison

Sizes for compiled+gzipped (bold) and compiled files.

	master	candidate	difference
datagrid/datagrid.js	25.1 kB 77.8 kB	29.3 kB 95.5 kB	4370 B 18099 B

[highsoft-bot]

Visual test results - No difference found

[sebastianbochan]

Spread operator should be faster.

[karolkolodziej]

Great work!

1. When writing api docs please stick to the convention:

    /**
     * Constructs a row in the data grid.
     *
     * @param dataGrid 
     * The data grid instance which the row belongs to.
     *
     * @param index 
     * The index of the row in the data table.
     */

2. I would like to have some convention about the class lifecycle methods:

• have "light" constructor that calls init
• init should set some basic options and call load and/or render
• update method is missing
• reflow I don't like it, buf if we need it let's keep it
• destroy is missing?