Merge branch 'ui/remove-grey-loader' into 'dev'

...ents/deleted-structures/deleted-structures.component.html

...ponents/lockdown-info/manage-lockdown-info.component.html

...ents/structures-list/admin-structures-list.component.html

src/app/app.component.html

src/app/post/components/post-list/post-list.component.html

...pp/structure/structure-join/structure-join.component.html

src/assets/gif/loader_circle_grey.gif