bug fix for jquery ui resizable grid and ghost functionality at the same time #67
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This is a fix so that when using resizable grid and resizable ghost the snapping to grid functionality still works. Previously if you try to use both, the ghost will adhere to the grid, but once you let go of the click it will resize the element to the last place your mouse is at and disregards the grid. This code in _mouseStop fixes this by doing a check to see if both properties exist. If they do then it runs through the grid logic before resizing. This code can definitely be optimized and im open to suggestions. I just ran into this issue when trying to use both together and this was the fix that worked for me.