fpdb.py: Add "Recreate HUD Cache" to Database menu

fpdb_db.py: Junk the dropping of indexes/FKs for MySQL INNODB in favor of just telling MySQL to ignore them.  Not sure if that works for other MySQL engines or other Database softwares.

pyfpdb/fpdb_db.py

@@ -356,6 +356,10 @@ class fpdb_db:
         """Drop some indexes/foreign keys to prepare for bulk import. 
            Currently keeping the standalone indexes as needed to import quickly"""
         stime = time()
+        if self.backend == self.MYSQL_INNODB:
+            self.cursor.execute("SET foreign_key_checks=0")
+            self.cursor.execute("SET autocommit=0")
+            return
         if self.backend == self.PGSQL:
             self.db.set_isolation_level(0)   # allow table/index operations to work
         for fk in self.foreignKeys[self.backend]:
@@ -445,6 +449,12 @@ class fpdb_db:
     def afterBulkImport(self):
         """Re-create any dropped indexes/foreign keys after bulk import"""
         stime = time()
+        
+        if self.backend == self.MYSQL_INNODB:
+            self.cursor.execute("SET foreign_key_checks=1")
+            self.cursor.execute("SET autocommit=1")
+            return
+
         if self.backend == self.PGSQL:
             self.db.set_isolation_level(0)   # allow table/index operations to work
         for fk in self.foreignKeys[self.backend]: