Fix `.close img` looking off-center.
Issue #3976: Send a profile update alongside a sharing notification

Issue #3976: Send a profile update alongside a sharing notification
Add multiphoto for mobile post
Merge pull request #4074 from L3MNcakes/feature/3975-send-profile-update

Issue #3976: Send a profile update alongside a sharing notification
Merge pull request #4067 from movilla/multiphoto

Add multiphoto for mobile post. Close #4053
Merge pull request #3841 from tubbo/fix-close-buttons

Align close button images

Sorry this took so long to merge in guys, I had this weird feeling that I had already done so. Looks like the 'X' button is coming after the custom popover HTML so this looks OK to merge in.
Update changelog. Apologize for idiocy.
added hotkeys to navigate in stream
jasmine-tests for hotkeys