Some tweaks to expose CORE <-> Rattail import handlers in web app

rattail_corepos/corepos/importing/rattail.py

@@ -43,8 +43,8 @@ class FromRattailToCore(importing.FromRattailHandler):
     """
     Rattail -> CORE-POS export handler
     """
-    host_title = "Rattail"
-    local_title = "CORE-POS"
+    local_key = 'corepos_api'
+    generic_local_title = "CORE Office (API)"
     direction = 'export'
 
     def get_importers(self):

rattail_corepos/corepos/lane/importing/op/office.py

@@ -38,6 +38,8 @@ class FromCoreOfficeHandler(FromSQLAlchemyHandler):
     """
     Base class for import handlers which use CORE Office as the host.
     """
+    host_key = 'corepos_db_office_op'
+    generic_host_title = 'CORE Office (DB "op")'
     host_title = "CORE Office"
 
     def make_host_session(self):
@@ -50,6 +52,8 @@ class ToCoreLaneHandler(ToSQLAlchemyHandler):
     Base class for import handlers which target CORE Lane on the local side.
     """
     local_title = "CORE Lane"
+    local_key = 'corepos_db_lane_op'
+    generic_local_title = 'CORE Lane (DB "op")'
 
     def make_session(self):
         return CoreLaneSession()

rattail_corepos/importing/corepos/api.py

@@ -48,6 +48,8 @@ class FromCOREPOSToRattail(importing.ToRattailHandler):
     """
     Import handler for data coming from a CORE POS API.
     """
+    host_key = 'corepos_api'
+    generic_host_title = "CORE Office (API)"
     host_title = "CORE-POS (API)"
 
     def get_importers(self):

rattail_corepos/importing/corepos/db.py

@@ -38,6 +38,8 @@ class FromCOREPOSToRattail(importing.FromSQLAlchemyHandler, importing.ToRattailH
     """
     Import handler for data coming from a CORE POS database.
     """
+    generic_host_title = 'CORE Office (DB "op")'
+    host_key = 'corepos_db_office_op'
     corepos_dbkey = 'default'
 
     @property