Ensure Column Order

[ryanlanciaux]

Ensure column order is maintained no matter how the data obtained (aka whether using griddle-core or not).

See GriddleGriddle/Griddle#83

[ryanlanciaux]

This should be tested against the following criteria:

• Given the set of columns in fake data, when checking and unchecking the first column in settings -- it should appear as column 0
• Given columns defined through ColumnDefinition with order properties, unchecking/checking the first column should maintain column position