updating charts are changing graph colors

[wirelessdreamer]

the updating charts in nightly dojox/charting/tests/test_chart2d_updating.html

are behaving differently then the updating charts on dojo campus ​http://dojocampus.org/explorer/#Dojox_Charting_2D_Updating

The dojocampus charts, stay a constant color, the nightly charts change colors with each update.

I was asking in irc and ttrenka said to open this ticket and assign it to him

[Tom Trenka]

(In [15240]) Fixes #7638 by doing the following:

• set it up so that each time you call setTheme on a chart, you are getting a clone of the theme and not the theme itself
• set it up so that every time render is called on a chart, the theme's color and marker positions are reset to 0

Added a clone method to Theme to support this as well. !strict.

[Tom Trenka]

(In [15241]) Refs #7638: force a clone of the default theme if none are set. !strict.

[Tom Trenka]

(In [15242]) Refs #7638: Fix the force a clone of the default theme if none are set. !strict.