Improved Image styling on Course Updates

Description

Goal
Improve Image styling on Course Updates

#1: Set Max-Width on Course Update Images
Prevent pixel defined course update images from exceeding the course update size using max-width: 100%

For example: https://courses.edx.org/courses/course-v1:PennX+SD1x+2T2017/course/

#2revent image floats and other positioning within course update HTML from rendering images outside of the welcome message frame:

Current:

with clearfix rule:

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Status

Assignee

Harry Rein

Reporter

Marco Morales

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