Remove unused modal call

This is already being accomplished in mediatools.js
Fix modal call for embed
Style the embed modal

It was hard to read and did not look good.  Black background, gray text, etc.
Make share link text visible

It was white-on-white
Make the media title text easier to read

on the share bar
Merge pull request #201 from mfairchild365/fixes

Fixes for embed modal and share menu