refactor code. add search history
Merge branch 'gxt3-sandbox' of git@github.com:iPlantCollaborativeOpenSource/ui-disk-resource-module into gxt3-sandbox

Conflicts:
	src/main/java/org/iplantc/core/uidiskresource/client/presenters/DiskResourcePresenterImpl.java
Merge remote-tracking branch 'origin/gxt3-sandbox' into strootman-dev

Conflicts:
	src/main/java/org/iplantc/core/uidiskresource/client/presenters/DiskResourcePresenterImpl.java
	src/main/java/org/iplantc/core/uidiskresource/client/views/DiskResourceView.java