Tidy up dropdowns on live blogs
adding mpu column
override styling for mpu slice's layout
compact list; mpu on other slice
line up vars
more indenting
reverting for ie9
correct no of cols
widths for ie
Merge pull request #6149 from guardian/mpu-containers

MPU slices
Merge pull request #6153 from guardian/liveblog-tablet-fixes

Tidy up dropdowns on live blogs
fix merge conflicts