(feat) Pulse the avatar of users in groups who are participants of the gathering

Closes #1515

See merge request !457

[Sprint/JollyJellyfish](chore): Update banner image buttons #1479

Closes #1479

See merge request !456

[Sprint/InterestingIguana](feat): max video size #1506

Closes #1506

See merge request !450

[Sprint/JollyJellyfish] (fix): implement autocomplete for reminds and edits

Closes minds#673

See merge request !458

[Sprint/GiddyGiraffe] (fix): analytics

See merge request !407

[Sprint/JollyJellyfish](fix): Fixed reload required after posting in group

See merge request !462

Brian Hatchet authored Jul 29, 2019 and Mark Harding committed Jul 29, 2019

Extended the post-menu-component to allow the enabling and disabling of services
Added an activityservice component to broadcast events when activity properties change
Acitvitiy, media and blogs components react to allow comments changing, disabling or enabling comment trees

(Feat)  disable comments 526

See merge request !426

[Sprint/JollyJellyfish] (fix): group conversations won't load

Closes engine#677

See merge request !466