add documentation for setColumnSize in bb-grid
add documentation for setColumnSize in bb-grid

Blackbaud-LukeJones/skyux,Blackbaud-StacyCarlos/skyux,Blackbaud-StacyCarlos/skyux,Blackbaud-LukeJones/skyux,Blackbaud-LukeJones/skyux,Blackbaud-StacyCarlos/skyux