[NEW] lazy load image attachments (#10608)

.meteor/packages

.meteor/versions

packages/rocketchat-lazy-load/client/index.js

packages/rocketchat-lazy-load/client/lazyloadImage.html

packages/rocketchat-lazy-load/client/lazyloadImage.js

packages/rocketchat-lazy-load/package.js

...ketchat-message-attachments/client/messageAttachment.html

...ocketchat-message-attachments/client/messageAttachment.js

packages/rocketchat-message-attachments/package.js

...ages/rocketchat-theme/client/imports/general/base_old.css

packages/rocketchat-ui-account/client/avatar/avatar.html

packages/rocketchat-ui-account/client/avatar/avatar.js

packages/rocketchat-ui-account/package.js

packages/rocketchat-ui-sidenav/client/sideNav.js

packages/rocketchat-ui-sidenav/client/sidebarItem.html

packages/rocketchat-ui-sidenav/package.js

packages/rocketchat-ui/client/views/app/room.js

packages/rocketchat-ui/package.js