[Glitch] Rename from instance to server.

Port 46e806cd2f to glitch-soc

app/javascript/flavours/glitch/features/public_timeline/index.js

@@ -127,7 +127,7 @@ export default class PublicTimeline extends React.PureComponent {
           onLoadMore={this.handleLoadMore}
           trackScroll={!pinned}
           scrollKey={`public_timeline-${columnId}`}
-          emptyMessage={<FormattedMessage id='empty_column.public' defaultMessage='There is nothing here! Write something publicly, or manually follow users from other instances to fill it up' />}
+          emptyMessage={<FormattedMessage id='empty_column.public' defaultMessage='There is nothing here! Write something publicly, or manually follow users from other servers to fill it up' />}
         />
       </Column>
     );