[FIX] render popover to other side on RTL (#10428)

packages/rocketchat-emoji/client/lib/EmojiPicker.js

...sh-notifications/client/views/pushNotificationsFlexTab.js

...heme/client/imports/components/sidebar/sidebar-header.css

packages/rocketchat-ui-flextab/client/flexTabBar.js

packages/rocketchat-ui-flextab/client/tabs/membersList.js

packages/rocketchat-ui-flextab/client/tabs/userInfo.js

packages/rocketchat-ui-message/client/messageBox.js

packages/rocketchat-ui-sidenav/client/sidebarHeader.js

packages/rocketchat-ui-sidenav/client/sidebarItem.js

packages/rocketchat-ui/client/views/app/popover.js

packages/rocketchat-ui/client/views/app/room.js