Paste handler optimizations #559
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call `setRowHeight` only once post the loop
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Currently the paste operation was bottlenecked by the usage of
setRowHeightafter every loop iteration. This PR changes this process so that therowHeightListis constructed as the loop is run, but the render is performed only post the loop is done - leading to total paste time of about 1 second as compared to 23 seconds for sheets containing prior data and 5000 rows being pasted.