Merge pull request #51 from mastercoin-MSC/master

Sync to Master
Update dust value consistency
Hide buy button from invalid transactions
add message for invalid tx
Trade:Change invalid tx message triggers
Trade: Move inactive message to tooltip
Trade: Move inactive message to notification
Trade: Move inactive message to notification
Update message and button title
Phrasing
Merge pull request #842 from achamely/master

Keep dust level consistent