Add option to disable the time dimension in WMS services that support the time dimension, to retrieve the default image

[josegar74]

Some WMS services with orthophotos composed of images taken at different times, use the time dimension.

GeoNetwork 4 displays a slider to see the different images, but it's not possible to see the full orthophoto.

This change adds an option to disable this feature, so the default value is returned, usually with all the images.

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Some issues pending:

• [ ] UI styling for the new option.
• [ ] When going to other application page, like the search and returning to the map, the option is not preserved.

[MichelGabriel]

It works like a charm. My only concern is that users don't see the checkbox or don't know that checking it fixes the displaying of the whole photo. They just go with what they see and miss the whole photo

[josegar74]

@MichelGabriel can you check if the styling of the checkbox can be improved a bit? The alignment of the label doesn't seem to be good.