hide the upbat pill if there is no uploader battery value

[jasoncalabrese]

This will prevent the sliver of a pill from being display for everyone using the bridge

[codecov-io]

Current coverage is 82.08%

Merging #797 into dev will not affect coverage as of 8524f8c

@@              dev    #797   diff @@
=====================================
  Files          60      60       
  Stmts        4013    4013       
  Branches        0       0       
  Methods         0       0       
=====================================
  Hit          3294    3294       
  Partial         0       0       
  Missed        719     719       

Review entire Coverage Diff as of 8524f8c

---

Uncovered Suggestions

1. +0.35% via lib/mqtt.js#128...141
2. +0.30% via ...rofile/js/profile.js#321...332
3. +0.30% via lib/mqtt.js#292...303
4. See 7 more...

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