Components: Make dialogs draggable

[Son-Lam]

Bug, feature request, or proposal:

Feature request

What is the expected behavior?

Users shall be able to drag dialogs around. Example, bootstrap already have draggable dialogs (http://jsfiddle.net/dave_wilton/a3gyq/5/)

What is the current behavior?

Dialogs position are fixed on the page. If users want to see something behind them they have to close the dialog, which is quite anoying.

What are the steps to reproduce?

Just open a dialog and try to move is round - you cannot.

Providing a Plunker (or similar) is the best way to get the team to see your issue.
Plunker template: http://plnkr.co/edit/o077B6uEiiIgkC0S06dd

What is the use-case or motivation for changing an existing behavior?

User-friendlies. Users may be editing a large spreadsheet and they need to pop up a dialog and enter data for one row. But they may need to look at data from other rows to make decision. In this case, with Angular Material2, they have to save incomplete data set or abandon it to close the dialog and open it later.

Which versions of Angular, Material, OS, browsers are affected?

ALL

Is there anything else we should know?

[jelbourn]

We have some thoughts on drag-drop in general, but anything in that space is firmly post-beta.

[cmark11]

Is this post-beta code available to integrate or 'test' out in the current version of angular-material2?

[LeoTanoue]

Any updates for this feature? I couldn't find a road map page anywhere to keep track of what's being worked on.

[thefliik]

@LeoTanoue the readme on the front page begins by laying out the current roadmap

[crisbeto]

This is possible now using the CDK drag-drop module.

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