Minor fixes: COHINC-91 (Jvisualvm Plugin Incorrectly Reports Session Counts for Multiple Coh*web Apps),  COHINC-84 (VisualVMModel generalDataArea should not be editable), COHINC-79 ( JVisualVM Plugin Does not Report Cache Storage Details when connected to 3.6 and earlier cluster)
Minor update to History.
Merge branch 'develop-12' of https://github.com/coherence-community/coherence-incubator into develop-12