improved performance in service
allow empty serialNumber for equipement
fix order list and manage button
Merge branch 'master' into workorder-list-view-hotfix
fix serial number has to be unic
fix provider message drop down display
Merge pull request #58 from clintonhealthaccess/provider-both-hotfix

fix provider message drop down display
Change in Department, Manufacturer and Supplier drop box for performance issue
Merge branch 'master' into spare-part-module