Fixed crash if color picker left open when control is deallocated.#7

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Dejal wants to merge 7 commits intodanieljfarrell:masterfrom

Commits on Aug 30, 2015

Fixed crash if color picker left open when control is deallocated.
Dejal
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Commits on Aug 31, 2015

Tweaked fix of crash if color picker left open when control is deallocated to not clear target & action.
Dejal
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Commits on Sep 17, 2015

Commits on Oct 3, 2015

Avoid a crash when rendering in IB.
Dejal
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Commits on Sep 24, 2017