Gridster height does not exclude outerMargin when unused

[adam-marshall]

So normally with outerMargin on, the <gridster> element is taller than <gridster-column>

this is as expected.

However I'm noticing that this extra 2x margin is applied even when outerMargin is set to false.

(there isn't an example amongst the demos at https://tiberiuzuld.github.io/angular-gridster2/ which allows you to set a fixed grid with outerMargin off to demonstrate this)