Remove empty space in People

Test plan:
  - Observe /courses/[id]/users
  - Note that it makes a product manager happier

Change-Id: If3981114298e117b993a04bf55d08b2a4427388d
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/355242
Reviewed-by: Chris Soto <christopher.soto@instructure.com>
Reviewed-by: Kai Bjorkman <kbjorkman@instructure.com>
Product-Review: Jeremy Perkins <jperkins@instructure.com>
QA-Review: Aaron Shafovaloff <ashafovaloff@instructure.com>
Tested-by: Service Cloud Jenkins <svc.cloudjenkins@instructure.com>

app/stylesheets/bundles/roster.scss

@@ -80,6 +80,10 @@
   }
 }
 
+.roster_user_name-cell {
+  width: 100%;
+}
+
 .ic-Table--striped tr:nth-child(odd) .roster_user_name {
   color: var(--ic-link-color-darkened-10);
 }

ui/features/roster/jst/index.handlebars

@@ -48,7 +48,6 @@
       >{{#t "people"}}People{{/t}}</a>
     {{/if}}
     {{/if}}
-    <form data-view="createUsers" class="form-dialog"></form>
 
     <div class="v-gutter">
       <div data-view="resendInvitations"></div>

ui/features/roster/jst/rosterUser.handlebars

@@ -1,7 +1,7 @@
 <td class="center">
   <div id={{avatarId}}></div>
 </td>
-<td>
+<td class="roster_user_name-cell">
   <a href="{{html_url}}" data-student_id="{{id}}" data-course_id="{{course_id}}"
     class="roster_user_name student_context_card_trigger">{{name}}{{#if pronouns}} <i>({{pronouns}})</i>{{/if}}
   </a>