Better UX for managing teams

- Moves the add team member to an inline box, rather than a popup
- Feedback bar is now used to show when a member is added, invited or removed
- Fixes bugs around using the view on mobile

Fixes #1509

static/directives/team-view-add.html

@@ -1,6 +1,6 @@
 <div class="team-view-add-element" focusable-popover-content>
   <div class="entity-search"
-       namespace="orgname" placeholder="allowEmail ? 'Add a registered user, robot or email address...' : 'Add a registered user or robot...'"
+       namespace="orgname" placeholder="allowEmail ? 'Add a registered user, robot or email address to the team' : 'Add a registered user or robot to the team'"
        entity-selected="addNewMember(entity)"
        email-selected="inviteEmail(email)"
        current-entity="selectedMember"
@@ -10,7 +10,9 @@
        allow-emails="allowEmail"
        email-message="Press enter to invite the entered e-mail address to this team"
        ng-show="!addingMember"></div>
-  <div class="quay-spinner" ng-show="addingMember"></div>
+  <div ng-show="addingMember">
+    <div class="cor-loader-inline"></div> Inviting team member
+  </div>
   <div class="help-text" ng-show="!addingMember">
   <span ng-if="allowEmail">Search by registry username, robot account name or enter an email address to invite</span>
   <span ng-if="!allowEmail">Search by registry username or robot account name</span>