Survey editing/taking Javascript and CSS fixes. This patch adds some cosmetic changes and functional fixes: - UI now removes all of the field content when a field is deleted, - CSS tweaks, and jQuery hack to specialize comment CSS, - fixed JS path in take.html. Reviewed by: Pawel Solyga (with some small changes)

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"""

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Code used in a couple of places to work with the current thread's environment.

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Current users include i18n and request prefix handling.

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"""

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try:

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    import threading

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    currentThread = threading.currentThread

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except ImportError:

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    def currentThread():

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        return "no threading"

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