added some white icons,
changed hardcoded icons to theme attributes,
changed icon_edit_dark to icon_edit_body to reflect icons position,
grey message bubbles in dark theme,
misc
purged ic_action_chat as it wasn't used
preference use_white_background changed to use_green_background, default true
grey chat bubbles darker, text white
replaced all grey600 with black icons and 0.54 alpha attribute
highlightColor in dark grey chat bubble now darker than background
Refactored the trust key row UI element so it can be used in multiple
places. It now also uses a slider to toggle the trust state, and the
redundant trust state description was removed.
EditAccountActivity now shows the keys of other devices associated with
that account.
