Change folder side-nav to client: Allows faster hot-reloads.

packages/rocketchat-ui-sidenav/client/accountBox.coffee

packages/rocketchat-ui-sidenav/client/accountBox.html

packages/rocketchat-ui-sidenav/client/channels.coffee

packages/rocketchat-ui-sidenav/client/channels.html

packages/rocketchat-ui-sidenav/client/chatRoomItem.coffee

packages/rocketchat-ui-sidenav/client/chatRoomItem.html

packages/rocketchat-ui-sidenav/client/combined.coffee

packages/rocketchat-ui-sidenav/client/combined.html

...es/rocketchat-ui-sidenav/client/createCombinedFlex.coffee

...ages/rocketchat-ui-sidenav/client/createCombinedFlex.html

packages/rocketchat-ui-sidenav/client/directMessages.coffee

packages/rocketchat-ui-sidenav/client/directMessages.html

...ages/rocketchat-ui-sidenav/client/listChannelsFlex.coffee

packages/rocketchat-ui-sidenav/client/listChannelsFlex.html

...ages/rocketchat-ui-sidenav/client/listCombinedFlex.coffee

packages/rocketchat-ui-sidenav/client/listCombinedFlex.html

...rocketchat-ui-sidenav/client/listPrivateGroupsFlex.coffee

...s/rocketchat-ui-sidenav/client/listPrivateGroupsFlex.html

packages/rocketchat-ui-sidenav/client/privateGroups.coffee

packages/rocketchat-ui-sidenav/client/privateGroups.html