fix($browser): fn.on_start_drag -fix a bug where this.set_dom_grid_height doesn't have a max height check first
fix($browser): fn.on_start_drag
-fix a bug where this.set_dom_grid_height doesn't have a max height check first

Firewall/gridster.js,Firewall/gridster.js,dsmorse/gridster.js,Firewall/gridster.js,dsmorse/gridster.js,dsmorse/gridster.js