timer object.

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event_handler_thread in the gui core that I accidentally deleted a few minutes ago.

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internal mutex before calling delete on the pointer that it contains.

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isn't created at all unless some part of an application calls some of the
gui_core code.

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instead added an overload that doesn't take any arguments.  I did this
because -O3 sometimes makes gcc ignore more complex default arguments.
I don't actually have any cases where this happened to this function
but I'm changing it just to be safe.

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Intel compiler.

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without them you get errors when compiling with the Intel compiler.

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    the implementation do recursive feature elimination when the user tries to
    rank all the features.
  - The report format that comes out of the rank_features() function is now
    also slightly different.

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sometimes.

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into the old change logs section.

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You can now adjust how much it scrolls when the mouse wheel is scrolled
as well as enabling scrolling via a mouse drag.

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some extra mutex locks to the global singleton in the gui core.

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since this is now mostly untrue.

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