[Monitoring] Change case of text in license screen

[gchaps]

Kibana version: 6.3.0

Describe the bug:

The Monitoring dashboard has a link to view the license in the upper left. The case of the of license name is lower case and should be init caps. So in this screen platinum should be Platinum.

The code that creates the text is in this file:
x-pack/plugins/license_management/public/sections/license_dashboard/license_status/license_status.js:41

This is the code.

title = `Your ${type} license is ${status.toLowerCase()}`;

In Management, they change the case of the text before passing it into the React control:

x-pack/plugins/monitoring/public/components/license/index.js#L55

The code is

type={type}