Merge pull request #258 from mozilla/feature/freeze-mode

package.json

src/assets/hud/bubble_off-hover.png

src/assets/hud/bubble_off.png

src/assets/hud/bubble_on-hover.png

src/assets/hud/bubble_on.png

src/assets/hud/freeze_off-hover.png

src/assets/hud/freeze_off.png

src/assets/hud/freeze_on-hover.png

src/assets/hud/freeze_on.png

src/assets/hud/mute_off-hover.png

src/assets/hud/mute_off.png

src/assets/hud/mute_on-hover.png

src/assets/hud/mute_on.png

src/assets/hud/tooltip.9.png

src/components/block-button.js

src/components/text-button.js

src/components/visible-while-frozen.js

src/hub.html

src/hub.js

yarn.lock