Minor bugs and improvements
Added posting button
Fixed bad "No idea found" page on post icon click.

Two bugs fixed: when ID was not specified a horrible error was
thrown instead of a nice one, and when the post icon was
clicked, it did not specify the ID of the idea, causing an error
to be thrown.
Added link back to idea from topic
Fixed incorrect language entry
Fixed colours bug in posting page
Added link to discussion topic for moderators
Removed stupid extra whitespace
Added user info to discussion topic