Update dialog help text of 'MoreDirectChannels' and 'AddUsersToTeam' modals (#6744)

webapp/components/add_users_to_team/add_users_to_team.jsx

@@ -201,7 +201,7 @@ export default class AddUsersToTeam extends React.Component {
         const numRemainingText = (
             <FormattedMessage
                 id='multiselect.numPeopleRemaining'
-                defaultMessage='You can add {num, number} more {num, plural, one {person} other {people}}. '
+                defaultMessage='Use ↑↓ to browse, ↵ to select. You can add {num, number} more {num, plural, one {person} other {people}}. '
                 values={{
                     num: MAX_SELECTABLE_VALUES - this.state.values.length
                 }}

webapp/components/more_direct_channels/more_direct_channels.jsx

@@ -285,7 +285,7 @@ export default class MoreDirectChannels extends React.Component {
         const numRemainingText = (
             <FormattedMessage
                 id='multiselect.numPeopleRemaining'
-                defaultMessage='You can add {num, number} more {num, plural, one {person} other {people}}. '
+                defaultMessage='Use ↑↓ to browse, ↵ to select. You can add {num, number} more {num, plural, one {person} other {people}}. '
                 values={{
                     num: MAX_SELECTABLE_VALUES - this.state.values.length
                 }}

webapp/components/multiselect/multiselect.jsx

@@ -234,12 +234,6 @@ export default class MultiSelect extends React.Component {
                         </button>
                     </div>
                     <div className='multi-select__help'>
-                        <div className='hidden-xs'>
-                            <FormattedMessage
-                                id='multiselect.instructions'
-                                defaultMessage='Use up/down arrows to navigate and enter to select'
-                            />
-                        </div>
                         {numRemainingText}
                         {noteTextContainer}
                     </div>

webapp/i18n/en.json

@@ -1792,8 +1792,7 @@
   "msg_typing.someone": "Someone",
   "multiselect.add": "Add",
   "multiselect.go": "Go",
-  "multiselect.instructions": "Use up/down arrows to navigate and enter to select",
+  "multiselect.numPeopleRemaining": "Use ↑↓ to browse, ↵ to select. You can add {num, number} more {num, plural, one {person} other {people}}. ",
-  "multiselect.numPeopleRemaining": "You can add {num, number} more {num, plural, one {person} other {people}}. ",
   "multiselect.numRemaining": "You can add {num, number} more",
   "multiselect.placeholder": "Search and add members",
   "navbar.addMembers": "Add Members",