A new option to allow the layer tree group node to expose the time dimension has been added on WMS-T layers.
A checkbox on the WMS group properties allows toggling the computation of this time dimension. If enabled, it would recursively generate the time dimension based on the child layer time dimensions.
A group whose time dimension computation is disabled would not propagate the time dimension of its children to its parent.
Date range for the time dimension has also been added in line with the OGC WMS and ISO8601 standards.