ACAS-814: Fix typo and styling on Salt browser/editor

[bffrost]

Description

Reported issue was a typo in user instructions. I also noticed use of color on buttons was inconsistent with the rest of the app, and there was a layout issue with the confirmation buttons on the Edit salt confirmation dialog.

• Fixed sepcify -> specify typo
• Removed btn-primary and btn-danger classes from most buttons in the workflow so btn-danger is only used on Delete dialogs. Switched Save / Update dialogs to btn-success (green)
• Removed the Cancel button from dialogs that had Back / Cancel / Save. The Back button already works to go backward and the wizard is only 2 steps deep, so I found the Cancel button to be unnecessary

Related Issue

How Has This Been Tested?

Manual testing. See video (sorry for low resolution):

ACAS-814.mov

[dalejerikson]

LGTM!

[brianbolt]

Thanks for the video, LGTM.