Fix table header sizing

[AdamWard1995]

This project uses semver, please check the scope of this pr:

• [ ] #none# - documentation fixes and/or test additions
• [X] #patch# - backwards-compatible bug fix
• [ ] #minor# - adding functionality in a backwards-compatible manner
• [ ] #major# - incompatible API change

the header columns were not being properly resized when the table was used as content for a frost-tabs tab

CHANGELOG

• Fixed table header resizing

[coveralls]

Changes Unknown when pulling a657d89d07ca21665ea6cab36f0f180768e2509c on AdamWard1995:headerFix into on ciena-frost:master.