HoloMap missing a slider

[jlstevens]

The keys are not orthogonal in this example, but there should still be two sliders:

Here is the code as text:

import numpy as np
import holoviews as hv
hv.notebook_extension()
hv.HoloMap({k:hv.Image(np.random.rand(10,10)) for k in [(10, 1.2), (20, 1.3), (30, 1.4)]}, 
           kdims=['a','b'])

Just to be sure, I checked orthogonal keys work fine, so there is no problem with this for instance:

hv.HoloMap({(k1,k2):hv.Image(np.random.rand(10,10)) 
                for k1 in range(10) for k2 in range(5)}, kdims=['a','b'])

[philippjfr]

This seems to be because the hierarchical dimensional handling in the widget code being broken. I'll see if it can be fixed easily otherwise I suggest we scrap it until we have a better solution.

[philippjfr]

This was fixed in #973. Closing.

[github-actions]

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