Screenshots, design tweaks, animations, launch bookmark key command

@artemgrygor and @artemgrygor, hey guys, was wondering if I could get your opinions on the last item on this list about the key command. 

- New Snapito API implemented to get screenshots working
- Lots of small design tweaks
- Revised Edit Modal Window design
- Small animation tweaks
- Lots of css organization stuff
- Changed key command for launching bookmark to `Cmd/Ctrl + Enter` to avoid conflicts with Typeahead search patterns (maybe it should be Cmd/Ctrl + Enter opens in new tab, since Cmd + Click works that way?)