1.0.14 - optimizing column type change functionality

This release contains changes that optimize the user experience when changing column types for custom columns defined in the customColumnsSettings. Previously, if the user changed the header cell text on a custom column with a defaultColumnTypeName, the type would simple be reset back to the "Text" type. Now, the type is retained unless the user explicitly changes the column type or changes the header cell text to another custom column's header name.