Add default values for lvalue widget
Fix broken chart tests
Change the graph widget's legend to use a default value for its metrics
Fix graph widget's scripts' indentation
Change the graph widget's hover marker to not show up when there are no datapoints
Merge branch 'develop' into feature/issue-118-allow-default-initial-values-for-widgets
Rebuild
Add ensureDefined, min and max utils to ensure we get null values, use this for the chart models min and max methods
Rebuild
Merge branch 'feature/issue-118-allow-default-initial-values-for-widgets' into develop