feat(flip_video): show button by default
feat(style): specify max width and height for video of me
feat(style): fix position of them video to 0 0 coord
chore(style): fix indenting
chore(chat.html): fix indenting
feat(zIndex): make small video always above big video

Increase z index of all other elements, so they will on the right hight,
compared to others.
chore(client.js): fix indentations
chore(client.js): fix indentations
chore(client.js): fix indentations
chore(client.js): fix indentations
chore(client.js): remove unused code
chore(client.js): fix indentations