Add ability to resize data grids in BPMN modeler

There are data grids throughout the modeler such as:

But often the columns are too small: such as the Name column can often be too short to handle business variables that tend to be longer in naming convention. "GlobalRetailPerWeekAveragePriceForTierTwoProductCategories"

Same problem for Metadata data grid:

So it would be very helpful if we could resize columns!