The Tip Card and Throbber should dynamically set their positions

[rguerrettaz]

USER STORY:

As a consumer of Tips.js I expect the modal to always be on the page AND I'd like the modal/throbber to set themselves based on the ideal position without me having to define where they should go. However, I'd like to be able to override the position if I please.

ACCEPTANCE CRITERIA

• If a user doesn't specify where the Tip Card should go, then Tips figures the optimal place.
• If a user doesn't specify where the Throbber should go, then Tips figures out the optimal place
• The optimal place should always be on the page, meaning the Tip Card should never be off the page
• On click of the throbber the Tip Card should never show above the top of the page or below the fold, instead it should dynamically show based on its current position