Space selection improvements

[malessainray]

Due to some structuring we have a bunch spaces with similar or even the same name.

1. To distinguish those if would be great if one could (maybe opt in through a setting) view the hierarchy one is familiar with from the left sidebar instead of a flat list everywhere where a selection of a space shall be made.
2. In the search if would be great if one could enter the id of a space to find exactly that space.
3. In the search it would be great if one could enter the name of a group of spaces and find the group with all the spaces in that group.

This screenshot is from the "create a page from this snippet"-Button