Fixed loading modal.
Merge pull request #530 from jfarid27/master

Fixed loading modal.
Merge remote-tracking branch 'upstream/master'
Removed autocloseable from datasets because Spring was closing on return
from controller method, for now the tables are closed automatically on
db connection drop (created with TEMPORARY tag) which could be enough,
but regardless this problem will need to be addressed.

After trying different things, this configuration seems to yield the
best performance, jOOQ for query building, indexed tables, H2 db url
caching options didn't seem to produce any results, shared caching for
all datasets.