message: Remove arrow opacity.
diff: @@ -362,7 +362,6 @@ export default class MessageComposer extends React.Component {
  popoverRect={popoverRect}
  arrowColor={'#76CFA6'}
  arrowSize={20}
  - arrowStyle={{ opacity: 0.7 }}
  >
  <div
  className='mx_PopoverOuterContainer'
  