+ Remove the `\strut` that was added at the end of minipage
environments in cells.
+ Replace `\tabularnewline` with `\\ \addlinespace`.
Closes#6842, closes#6860.
We now have LaTeX do the calculation, using `\tabcolsep`.
So we should now have accurate relative column widths no
matter what the text width.
The default template has been modified to load the calc
package if tables are used.
This fixes a bug wherein footnotes appeared in the wrong
order, and with duplicate numbers, when in table captions
and cells.
We now use regular `\footnote` commands, even in the table
caption and the minipages containing cells. Apparently
longtable knows how to handle this.
Closes#5367.
