Variable Detail dialog for arrays show wrong shape if a 1dim np.ndarray is displayed

[M. Gronle]

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The reason for this is, that the 1d np.ndarray is internally casted to a dataObject, which always maps a 1dim array to a 1xN 2dim dataObject.

Solution: Find a workaround to correctly transport the original number of dimensions and display them including the correct shape.

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[Johann Krauter]

fixes issue 178: during the conversion from numpy.ndarray to dataObject the tags "_shape" and "_dtype" are added show show the origin numpy shape, especially for 1-dim vectors. Additionally, the metaWidget is hidden for the numpy.ndarray object because it does not provide meta informations

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