Add ability to group mods/plugins together

[cyberrumor]

Acceptance criteria:

• Create / Rename / Reorder groups
• Delete empty groups
• Move mod/plugins into or out of groups
• A group in the mods list would be independent of a group in the plugins list.
• No nested groups
• Ability to fold or expand groups. Helps with usability with large mod lists.
• File conflicts are resolved locally to the group, then the winning files are considered for conflict resolution in relation to everything else.

[cyberrumor]

I'm closing this since I've just made it possible to activate/deactivate all visible components using the all keyword instead of <index>.

You can now do something like the following:

    find light          # show only lighting mods/plugins
    deactivate mod all  # deactivate all lighting mods
    find armor          # only show armor mods/plugins
    activate plugin all # activate all armor plugins
    find                # show all components
    commit              # save changes

This should help speed up your workflow when working with large amounts of mods/plugins.