Minimise/hide/remove(?) node/pages

[Yuu-Han]

'remove' should not be allowed as all provenance ought to be captured

• As a filter, not really delete node from the hmpages array?

[kaidatavis]

Hide or minimise nodes? We probably don't want to remove them from the data structure.

Also related would be grouping/tagging nodes? 'Favourite' and 'read later' can be two special groups or tags.

[Yuu-Han]

Favourite is supported (9ae9d661ef9589f57b4896d514494366c3d745cc).

For minimise/remove (hide?), we need to consider the corresponding node representation.