Add support for the BB10 clear textbox icon

[mdandrea]

In BB10, an icon to clear a text box appears on the right hand side of a text box and looks like an X surrounded by a circle.
This applies to input type=text but not input type=password (which uses the show password / eye icon instead).

[mdandrea]

One other thing related to this is that the current X allows for text to appear behind it (which makes that text hard to read). The text should only go up to the X, but no further. A similar thing goes for the "show password" icon in issue #513 .

[tneil]

Made some progress on this today.. hopefully finish it tomorrow

[tneil]

As a note to myself.. right now the control jitters a bit when focused

[tneil]

This has now been fixed

[chakrapanimargani]

can any body tell me from where i can get the code for this issue fix

[splatterb0y]

grab the latest bbUI.