added alt to images

use new virtual scroll

Ui fixes

Offline

added spinner to first channel loading
remove redundant stuff from main page

fixed sidenav toggle

Feat/virtual scroll

# Conflicts:
#	src/app/chat/chat-view/chat-view.component.ts
#	src/app/chat/services/chat/chat.service.ts

Oauth

fixed keyboard closing when send key is pressed in mobile

# Conflicts:
#	src/app/shared/components/login-page/login-page.component.ts

Bug/some fixes