Move notification z-index above modal z-index

[EWhite613]

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

CHANGELOG

• Set notification z-index to appear above modals

[EWhite613]

Reference: https://github.com/ciena-frost/ember-frost-notifier/pull/41

[sglanzer-deprecated]

Makes sense to me - I'll just confirm this with UX

[sglanzer-deprecated]

Approved

[sglanzer-deprecated]

Approved - Adjusted navigation to just below app bar per UX

[coveralls]

Changes Unknown when pulling 45a0b9ae4c4ac95843a061673b17a25cb93f2c0d on EWhite613:z-index-changes into on ciena-frost:master.

[coveralls]

Changes Unknown when pulling 45a0b9ae4c4ac95843a061673b17a25cb93f2c0d on EWhite613:z-index-changes into on ciena-frost:master.