Support catalogues

[jsbrittain]

Resolves #103 , #109 , #110 , #138 , #139
Partially resolves: #150

Catalogue interface. This merges the Hub and Library sections into a new Library section.

New Library screen showing an imported catalogue, and a user defined catalogue. The imported catalogues uses theming from its catalogue.json file, while user-defined catalogues use default theming (setting the 'global theme' is a separate issue).

Actions menu:

Add catalogue dialog (can enter a repository, or just an owner such as artic-network which defaults to artic-network/glacier-catalogue):

Add workflow dialog:

Catalogue menu:

Note: After this update, it is recommended to remove existing GLACIER workflows/instances folder as catalogues are the new top-level organisation.

[rambaut]

This looks great. Could "Remove Catalogue" ask for confirmation (and perhaps tell you that you have installed workflows and could lose defaults etc).

[rambaut]

Perhaps "Install all" should be on each section?

[rambaut]

If you install a workflow that is in more than one section (which I believe we allow) - will it automatically show as installed in both places?

[rambaut]

When adding a workflow to the User collection does it automatically install?

[jsbrittain]

Perhaps "Install all" should be on each section?

Yes, I had planned on having an Install-all button available in both the Catalogue and Section menus.

[jsbrittain]

This looks great. Could "Remove Catalogue" ask for confirmation (and perhaps tell you that you have installed workflows and could lose defaults etc).

Yes, definitely.

[jsbrittain]

If you install a workflow that is in more than one section (which I believe we allow) - will it automatically show as installed in both places?

Yes, this functionality is already in-place.

[jsbrittain]

When adding a workflow to the User collection does it automatically install?

No, adding workflows (or catalogues) does not automatically install anything. I had considered a 'install now' tickbox, or 'Add & Install' button in the dialog prompt, but wasn't sure if that was desired functionality.