fix style problem on conversation filter tag
fix style problem on conversation filter tag

Fixes CNVS-3993

This fixes IE, Chrome, and Firefox display issues.
This actually just brings it to match current
production.

Testing Notes:
===========
* Verify the correct tag appearance
   in all supported browsers for
   filtering inbox messages.
* Verify correct appearance for compose
  message use when sent to single person
  and also when sent to multiple
  people in a group like "all students"
  in a course. Shows text like "7 people"
  to the right of the course name.

Change-Id: Iabdfffd89af40c9ff6f2d1e2c3dcecedbf1a58ce
Reviewed-on: https://gerrit.instructure.com/18460
Reviewed-by: Eric Berry <b4e131942074b4e4dafdcc14a63e85b7d8e18577@instructure.com>
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
QA-Review: Marc LeGendre <d33c80bc45d65303e33ca83108a9952b745af9ef@instructure.com>

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