Fixed bug where attribute selector would not select appropriate
dimension when opened.
No longer closing attribute selector when target gets disposed (controls
hide instead).

Change-Id: I545b06e8c9b7644b53a97b648e36d6f74b38b245
Color attribute component no longer disables itself when color override
is enabled.

Change-Id: I9194a3ce1919195d6f47cf9fc94b43b5d0e2bbbb
Added horizontal option for histogram.

Change-Id: Ie3172682fa865a59b8117c5372644cd2ccecc76a