is it possible to limit the level of customization of groups/spaces?
For example, I'm thinking something like:
Define 1-2 group/space layout to choose from, where a section of it must use a fixed set of widget (e.g. the left bar in a 2 or 3 columns layout). The rest can be personalized with widget/tiles. Is this a theme customization?
Define which subset of widget/tiles will be available to personalize the page, if needed (e.g. do not allow to choose people widgets). Is this a theme customization?