Solving this: https://linear.app/comm/issue/ENG-2045/add-highlight-effect-to-arrow-background-when-finger-is-on-thread-row
Reorganised SidebarListModal, ChatThreadListSidebar and SidebarItem, so that
SidebarItem doesn't hold button anymore, but rather is wrapped inside it.
Changed arrows SVG, so instead of short and long ones we have arrows extending in both ways and
short arrows that don't extend downwards, so they can finish list of thread sidebars.
We definitely should return something from this lambda since otherwise it is useless to assign it to variable.
If we find that we don't have permissions then just calling await this.requestAndroidNotificationsPermission(); would result in a prompt asking for notifications permissions. However if the user grants those permissions then hasPermissions is still falsy (since promise returned nothing), so deviceToken will be set to null. Nevertheless permissions are actually granted byt the OS, so the state on the device and keyserver would heal itself on next render.
This differential fixes this case so that if user grants permissions correct state is achieved immediately without need for additional re-render to heal the state.