Work Item and Activity screens mostly complete

mobile/src/ui/index.js

@@ -1,5 +1,8 @@
 export { BoundSwitch } from './BoundSwitch'
 export { BoundInput } from './BoundInput'
 export { BoundButton } from './BoundButton'
+export { BoundOptionStrip } from './BoundOptionStrip'
 export { Icon } from './Icon'
 export { Header } from './Header'
+export { PhotoButton } from './PhotoButton'
+export { OptionStrip } from './OptionStrip'