[web] Add check and notifications settings icons

Summary:
Imported with IcoMoon new icons used in notification settings. Three of them are custom SVGs from Figma for different settings, and one is check icon from SWM Icon Pack

Test Plan: Confirm, that all existing icons display correctly

Reviewers: benschac, palys-swm, atul

Reviewed By: palys-swm, atul

Subscribers: ashoat, palys-swm, Adrian, atul, yayabosh

Differential Revision: https://phabricator.ashoat.com/D3944