Add styles improvements for deleting rows.

ui/src/admin/components/DeleteRow.js

@@ -10,18 +10,18 @@ const DeleteButton = ({onConfirm}) => (
 )
 
 const ConfirmButtons = ({onDelete, item, onCancel}) => (
-  <div className="admin-table--delete">
+  <div>
     <button
       className="btn btn-xs btn-primary"
       onClick={() => onDelete(item)}
     >
-      Confirm
+      <span className="icon checkmark"></span>
     </button>
     <button
       className="btn btn-xs btn-default"
       onClick={onCancel}
     >
-      Cancel
+      <span className="icon remove"></span>
     </button>
   </div>
 )

ui/src/admin/components/RoleRow.js

@@ -51,7 +51,7 @@ const RoleRow = ({role: {name, permissions, users}, role, onDelete}) => (
         /> : '\u2014'
       }
     </td>
-    <td className="text-right">
+    <td className="text-right" style={{width: "85px"}}>
       <DeleteRow onDelete={onDelete} item={role} />
     </td>
   </tr>

ui/src/admin/components/UserRow.js

@@ -27,7 +27,7 @@ const UserRow = ({user: {name, roles, permissions}, user, onDelete}) => (
         /> : '\u2014'
       }
     </td>
-    <td>
+    <td className="text-right" style={{width: "85px"}}>
       <DeleteRow onDelete={onDelete} item={user} />
     </td>
   </tr>

ui/src/admin/components/UsersTable.js

@@ -3,9 +3,9 @@ import UserRow from 'src/admin/components/UserRow'
 import EmptyRow from 'src/admin/components/EmptyRow'
 
 const UsersTable = ({users, onDelete}) => (
-  <div className="panel panel-minimal">
+  <div className="panel panel-info">
     <div className="panel-body">
-      <table className="table v-center">
+      <table className="table v-center admin-table">
         <thead>
           <tr>
             <th>User</th>