#7061 DataGrid resize feature

[MariuszJurowicz]

No description provided.

[scottdraves]

has some issues. after using it for a while i got this error:

VM99 index.js:138226 Uncaught TypeError: Cannot read property 'region' of null
    at EventManager.handleMouseDown (VM99 index.js:138226)

sometimes the blue rect got left on after mouse up.
try resizing to make the table as short as possible, then drag to make it tall.

[scottdraves]

if you drag quickly to vertically to increase the size, and the mouse leaves the output area, then the resize stops.

if you drag to vertically to decrease the size, and the mouse moves above the table and leaves the output area, then the table jumps to very large size.

when i resize horizontally, it looks good, but my change is immediately undone. i guess the handler for horizontal resize has triggered. if this is not easy to fix then just remove horizontal dragging.