Use placeholders for Intranet default-desktop-screen-images
TODO for followup
Use placeholders for Intranet default
Use placeholders for Intranet default-desktop-screen

TODO for follow-up
Use placeholders for Intranet default-mobile

Combined some dup selectors
Use placeholder for Intranet default-ie8
Use placeholder for Intranet default-ie7
Fix indenting for Intranet default-responsive
Use placeholder for Intranet default-responsive768

Mainly done so that the important declaration can be tested for affect
when removed
Use placeholders for Intranet serv
Merge Intranet default-screen-images-ie sheets

Where dupes so combined and placeholdered them
Merge pull request #988 from nschonni/placeholder-intranet-theme

Use Sass placeholders for Intranet theme