Bug 5041 Include comments search in S2 search module

Simplified and corrected  fix.
Print_search_form method checks if comments are indexed here,
if so adds a "with comments" checkbox.
Currently comments are indexed if the journal being viewed is paid.
(Bug 5041) Include comments search in S2 search module

Style fixes as per review comments.
Text box, comment search checkbox and Search button  on separate lines
Bug 5041 Include comments search in S2 search module

Each element of the form is now in a separate span
which can be styled inline or block.
Appropriate CSS in Tabula Rasa, fix for WideOpen.
Still to do: - check if any other TR children need overrides
- add CSS for non-TR layouts
(Bug 5041) Include comments search in S2 search module

CSS added for Abstractia, Bases, Brittle, Drifting
Negatives and Skittlish Dreams
which don't inherit from Tabula Rasa.
Merge pull request #534 from LivredOr/5041_comments_search_module_3

Bug 5041 Include comments search in S2 search module