Smarter spreadsheet column widths

This issue was created automatically from an original Mantis Issue. Further discussion may take place here.

Please make the spreadsheet view have smarter column widths. An example where this fails is with can.exo. Do the following:

Linux, 5.0.1, local server.
Open can.exo. All vars on. Apply.
Split screen horizontal. spreadsheet view. Turn on visibility. Notice that the Points X, Y, Z doesn't show up properly.

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