Pinned projects/subgroups in groups

Description

In some of my groups, I use several projects for common resources needed in all other projects of the group. Usually I have to search for these resource projects every time I need them because other projects are updated more commonly and move them down in the project list.

The current sorting options provide no reliable way of keeping these projects at the top of the list other than creating these resource projects before all other projects and then sorting by "Oldest created".

Proposal

Projects should be able to be pinned (inside groups for example) so that they always appear at the top of the project list. This way, they will always be accessible without searching through the list when they are needed.

The same logic should apply to subgroups as well.

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