Multiple fixes and add Group Backend support

[tortuetorche]

NOTE: This big pull request will be eventually split in multiple pull requests...

• Add group_backend option to mirroring the circle as a group (automatically suffixed by Circle)
  You can customize prefix and suffix with the group_backend_name_prefix and group_backend_name_suffix options
  The main goal is to have better integrations with Nextcloud applications and clients. (fix Offer setting so that any circle creates a group #363)
  You should also hide these mirrored circles in Nextcloud applications and clients, because their equivalent group will be used instead, via the allow_listed_circles option set to 0
  • When the group_backend option is enabled, store the mirrored group id in the group_id column of the circles_circles table, useful when the circle's name is updated
  • Add option allow_listed_circles To show (1, default) or hide (0) circles in shared list, disabling this option is very useful when the group_backend option is enabled
  • Exclude personal and secret circles from Group backend, if the group_backend option is enabled
• Enhance onSettingsChange event to get old setting values (including name and description attributes).
• Add allow_adding_any_group_members option to allow (1, default) or not adding group members from any users. When value is set to 0 it's not possible anymore to add contacts as circle members for private and public circle types, and it's only possible for groups where the current user is a member or for global administrators. Because they can't be group members, useful when the group_backend option is enabled. There is already the accounts_only option but it applied for any types of circles... (fix Non-admin users should not be able to add group(s) to circles #128)
• You can now add members in personal circles when skip_invitation_to_closed_circles option is enabled (fix Circle - Can't add persons in personal circle by activating skip invation for closed circle in settings #382 and add users without confirmation in a closed group #360)
• Fix Parsing error in activities when user request to join a circle (see Parsing error in activities when user request to join a circle #243)
• Fix CSS
• Fix translations
• Fix adding group with member limit -1 or 0 (fix Add group doesn't work with member limit -1|0 #342)

[tortuetorche]

Hi @daita,

Can you tell me if I need to split this big pull request in one pull request per commit, please?

Have a good day,
Tortue Torche

[ArtificialOwl]

Hello,

Thanks for this huge commit, but I would prefer a list of small PR instead ! (also, some of those are already fixed ;p)

Regards,

[tortuetorche]

Hi @daita,

Thanks for this huge commit, but I would prefer a list of small PR instead ! (also, some of those are already fixed ;p)

It's done, here my pull requests: #390, #391, #392, #393, #394, #395, #396, #397, #398, #399, #400 and #401!

NB: You should merge them in the ascendant order, otherwise some issues might appears...

Have a good day,
Tortue Torche

[joshtrichards]

Closing since this PR was subsequently handled through split up PRs: #384 (comment)