Minor features and bug fixes

• It is now possible to add vendor pricelists to agreement types
• When merging tickets uploaded files would not be included, this has been fixed so that files are actually copied when merging tickets.
• Added address and location to the asset list on the agreement page.
• The background colors of the message boxes on the ticket page was reversed compared to the message box. This has now been fixed so that the colors are consistent.
• Added a new button to cancel purchases in Credit.